A screenshot of Doom, one of the breakthrough games of the genre, displaying the typical perspective of a first-person shooter.
First-person shooter (FPS) is a video game genre that centers the gameplay on gun and projectile weapon-based combat through first-person perspective; i.e., the player experiences the action through the eyes of a protagonist. Generally speaking, the first-person shooter shares common traits with other shooter games, which in turn fall under the heading action game. From the genre's inception, advanced 3D or pseudo-3D graphics elements have challenged hardware development, and multiplayer gaming has been integral.
The first-person shooter has since been traced as far back as Maze War, development of which began in 1973, and 1974's Spasim. 1987's MIDI Maze for the Atari ST was one of the first network multiplayer action games and also saw release on game consoles. The genre coalesced with 1992's Wolfenstein 3D, which is generally credited with creating the genre proper and the basic archetype upon which subsequent titles were based. One such title, and the progenitor of the genre's wider mainstream acceptance and popularity was Doom, released the following year and perhaps the most influential first-person shooter. Half-Life, released in 1998, enhanced the narrative and puzzle elements, and along with its 2004 sequel Half-Life 2, showcases the considerable development of the genre's potential. GoldenEye 007 (1997) was a first landmark first-person shooter for home consoles, with the Halo series heightening the console's commercial and critical appeal as a platform for first-person shooter titles. Metroid Prime (2002) further expanded the genre's potential by popularizing action-adventure elements in the genre. In the 21st century, the first-person shooter is one of the most commercially viable and fastest growing video game genres.
Definition[]
First-person shooters are a type of three-dimensional shooter game, featuring a first-person point of view with which the player sees the action through the eyes of the player character. They are unlike third-person shooters which are seen from the back, allowing the gamer to see the character they are controlling. The primary design element is combat, mainly involving firearms. They are also often categorized as being distinct from light gun shooters, a similar genre with a first-person perspective which use light gun peripherals, in contrast to first-person shooters which use conventional input devices for movement. Another key difference is that first-person light-gun shooters like Virtua Cop are often on-rail shooters, whereas first-person shooters like Doom are off-rails and free-roaming.
The first-person shooter may be considered a distinct genre in itself, or a type of shooter game, in turn a subgenre of the wider action game genre. Following the release of the influential Doom in 1993, games in this style were commonly termed "Doom clones"; in time this term has largely been replaced by "first-person shooter". Wolfenstein 3D, released in 1992, the year before Doom, is generally credited with inventing the genre, but critics have since identified similar though less advanced games developed as far back as 1973. There is sometimes disagreement regarding exactly what design elements constitute a first-person shooter, for example, Deus Ex or Vampire: The Masquerade – Bloodlines are sometimes considered first-person shooters, but may also be considered role-playing video games as they borrow from this genre extensively. Some commentators may extend the definition obliquely to include combat flight simulators, as opposed to characters on foot.
Game design[]
Like most shooter games, first-person shooters involve an avatar, one or more ranged weapons, and a varying number of enemies. Because they take place in a 3D environment, these games tend to be somewhat more realistic than 2D shooter games, and have more accurate representations of gravity, lighting, sound and collisions. First-person shooters played on personal computers are most often controlled with a combination of a keyboard and mouse. This system is often considered superior to that found in console games, which frequently use two analog sticks, one used for running and sidestepping, the other for looking and aiming. It is common to display the character's hands and weaponry in the main view, with a head up display showing health, ammunition and location details. Often, it is possible to overlay a map of the surrounding area.
Combat and power-ups[]
First-person shooters often focus on action gameplay, with fast-paced and bloody firefights, though some place a greater emphasis on narrative, problem-solving and logic puzzles. In addition to shooting, melee combat may still be used extensively. In some games, melee weapons are especially powerful, a reward for the risk the player must take in maneuvering his character into close proximity to the enemy. In other situations, a melee weapon may be less effective, but necessary as a last resort. "Tactical shooters" are more realistic, and require teamwork and strategy to succeed; the player often commands a squad of characters, which may be controlled by the game or by human teammates.
These games typically give players a choice of weapons, which have a large impact on how the player will play the game. Some have highly realistic models of real weapons, including their rate of fire, size of ammunition, and accuracy. However, they may allow players to carry many of them at the same time, with no reduction in speed or mobility. Thus, the standards of realism varies between design elements. The protagonist can generally be healed and re-armed by means of items such as first aid kits, simply by walking over them. Some games allow players to accumulate experience points similar to those found in role-playing games, which can unlock new weapons and abilities.
Level design[]
First-person shooters may be structurally composed of levels, or use the technique of a continuous narrative in which the game never leaves the first-person perspective. Others feature large sandbox environments, which are not divided into levels and can be explored freely. In first-person shooters, protagonists interact with the environment to varying degrees, from basics such as using doors, to problem solving puzzles based on a variety of interactive objects. The environment can be damaged, also to varying degrees: one common device is the use of barrels containing explosive material which the player can shoot, destroying them and harming nearby enemies. Other games feature environments which are extensively destructible, allowing for additional visual effects. The game world will often make use of science fiction, historic (particularly World War II) or modern military themes, with such antagonists as aliens, monsters, terrorists and soldiers of various types. Games feature multiple difficulty settings; in harder modes, enemies are tougher, more aggressive and do more damage, and power-ups are limited. In easier modes, the player can succeed through reaction times alone; on more difficult settings, it is necessary to memorize the levels through trial and error.
Multiplayer[]
Later first-person shooters utilize the internet for multiplayer features, but local area networks were more commonly used in early games.
First-person shooters may feature a multiplayer mode, taking place on specialized levels. Some games are designed specifically for multiplayer gaming, and have very limited single player modes in which the player competes against game-controlled characters termed "bots". Massively multiplayer online first-person shooters allow thousands of players to compete at once in a persistent world. Large scale multiplayer games allow multiple squads, with leaders issuing commands and a commander controlling the team's overall strategy. Multiplayer games have a variety of different styles of match. The classic types are the deathmatch (there is also a team-based version) in which players score points by killing other players' characters, and capture the flag, in which teams attempt to penetrate the opposing base, capture a flag and return it to their own base whilst preventing the other team from doing the same. Other game modes may involve attempting to capture enemy bases or areas of the map, attempting to take hold of an object for as long as possible while evading other players, or deathmatch variations involving limited lives or in which players fight over a particularly potent power-up. These match types may also be customizable, allowing the players to vary weapons, health and power-ups found on the map, as well as victory criteria. Games may allow players to choose between various classes, each with its own strengths, weaknesses, equipment and roles within a team.
History[]
Before the popularity of first-person shooters, the first-person viewpoint was used in vehicle simulation games such as Battlezone.
Origins: 1970s to late 1980s[]
The earliest two documented first-person shooter video games were Maze War and Spasim. Maze War features on-foot gameplay that evokes modern first-person shooter games. Development of the game began in 1973 and its exact date of completion is unknown. Spasim had a documented debut at the University of Illinois in 1974. The game was a rudimentary space flight simulator, which featured a first-person perspective. They were distinct from modern first-person shooters, involving simple tile-based movement where the player could only move from square to square and turn in 90-degree increments. Spasim led to more detailed combat flight simulators and eventually to a tank simulator, developed for the U.S. army, in the later 1970s. These games were not available to consumers, however, and it was not until 1980 that a tank video game, Battlezone, was released in arcades. A version of which was released in 1983 for home computers and became the first successful mass-market game featuring a first-person viewpoint and wireframe 3D graphics, presented using a vector graphics display.
Early first-person shooters: 1987-1992[]
"First-person Pac-Man". MIDI Maze on the Atari ST was released in 1987 and featured networked multiplayer "deathmatches".
MIDI Maze was an early first-person shooter released in 1987 for the Atari ST. It featured maze-based gameplay and character designs similar to Pac-Man, but displayed in a first-person perspective. It was unique in featuring network multiplayer through the MIDI interface long before mainstream Ethernet and Internet play became commonplace. It featured a deathmatch mode where all players could compete against each other or players could compete in a team deathmatch, consisting of teams with players each competing against each other. It is considered the first multiplayer 3D shooter on a mainstream system and the first major network multiplayer action game, with support for as many as 16 players. It was followed up by ports to various platforms in 1991 under the title Faceball 2000, including the Game Boy and Super NES, making it possibly the first handheld first-person shooter and an early console and multiplatform example of the genre.
1987 also saw the release of Incentive Software’s Freescape 3D graphics engine, which was used for several of their adventure games, most notably the 1988 releases Dark Side and Total Eclipse, which used first-person viewpoints, total freedom of movement, plus the ability to target enemies with ranged weapons.
Arsys Software's Star Cruiser, an early first-person shooter released for the NEC PC-8801 computer in 1988 and ported to the Sega Mega Drive console in 1990, was an innovative game that introduced the use of fully 3D polygonal graphics, action RPG elements, and free-roaming open space exploration allowing six degrees of freedom. 1988’s The Colony, programmed by David Alan Smith was inspired by James Cameron’s “Aliens”[1]and using real-time rendered 3D graphics, the player freely explores a futuristic environment, shooting baddies and solving puzzles along the way. In 1999 MacWorld featured the game in their “Top Ten Mac Gaming Thingies”, describing it as, “scarily real... unlike today's shooters, it required more than a deft trigger finger to complete.”
Arcade and console developers also made several key contributions to the genre during this period. The 1988 video game, Golgo 13: Top Secret Episode for the NES, featured various first-person shooter levels and is notable for incorporating a sniper rifle, used to assassinate enemies from a long distance by aiming an unsteady sniper scope. In 1990, SNK's Super Spy for the arcades and Neo Geo console was a beat 'em up with first-person shooter elements, and although the player's movement is quite restricted, it is significant as it featured the player character's arms and weapons visible on screen, reminiscent of later key FPS titles such as Wolfenstein 3D and Doom. Also, in early 1991, Data East's first-person shooter Silent Debuggers for the TurboGrafx-16 console allowed players to aim the gun sight when shooting at enemies.
In 1990, PC and home computer sports game developer, Bethesda Softworks, released the first of their games based on The Terminator film franchise, marking the start of the their long affiliation with the first-person genre. The game’s sequels, such as The Terminator: Rampage (1993) and The Terminator: Future Shock (1995) would continue to expand the first-person shooter theme, with the latter offering one of the first uses of, the now staple, ‘mouse-look’ feature for the PC FPS gamer. In the same periodBethesda would also go on to develop the celebrated first-person RPG series, The Elder Scrolls.
John Carmack & John Romero's Catacomb 3-D, released in 1991, set the template for future first-person shooters.
Id Software's Hovertank 3D pioneered ray casting technology in 1991 to enable faster gameplay than 1980s vehicle simulators; and a later advance, texture mapping, was introduced with Ultima Underworld: The Stygian Abyss, a 1992 role-playing game by Looking Glass Technologies that featured a first-person viewpoint and an advanced graphics engine. When shown a demo of Ultima Underworld the year before, id developer John Carmack remarked that he "could write a faster texture mapper", and would feel motivated by Looking Glass's example to do the same in Catacomb 3-D (which was released in late 1991). Catacomb 3-D also introduced the display of the protagonist's hand and weapon (in this case, magical spells) on the screen, whereas previously aspects of the player's avatar were not visible. The experience of developing Ultima Underworld would make it possible for Looking Glass to create the Thief and System Shock series years later.
Back in the arcades, Taito's Gun Buster was an innovative first-person shooter released in 1992. It featured on-foot gameplay and a unique control scheme where the player moves using an eight-direction joystick and takes aim using a mounted positional gun. It was also unique in allowing two-player cooperative gameplay for the mission mode, and also featured deathmatch and team deathmatch modes.
Rise in popularity: 1992-1995[]
Although it was not the earliest shooter game with a first-person perspective, Wolfenstein 3D is often credited with establishing the first-person shooter genre.
Wolfenstein 3D (created by id Software and released in 1992) was an instant success and is generally credited with inventing the first-person shooter genre proper. It built on the ray casting technology pioneered in earlier games to create a revolutionary template for shooter game design, which first-person shooters are still based upon today. It introduced a fresh formula to the personal computer game market that successfully combined the fast pace and quick reflexes of arcade action games (such as Space Invaders, Pac-Man and Altered Beast) that pit the player against multiple enemies that come in increasing waves of speed and complexity, with the first-person perspective of traditional role-playing video games (such as Wizardry) that attempted to provide players with an immersive experience. While previous computer shooter games were most often scrolling shooters, Wolfenstein 3D helped move the computer market towards first-person shooters instead. Despite the violent themes, Wolfenstein largely escaped the controversy generated by the later Doom, although it was banned in Germany due to the use of Nazi iconography; and the Nintendo version replaced the enemy attack dogs with giant rats. Apogee Software, the publisher of Wolfenstein 3D, followed up its success with Blake Stone: Aliens of Gold in 1993. The game was initially well received but sales rapidly declined in the wake of the success of id's Doom, released a week later.
Doom, released as shareware in 1993, refined Wolfenstein 3D's template by adding improved textures, variations in height (such as stairs the player's character could climb) and lighting effects such as flickering lights and patches of total darkness, creating a more believable 3D environment than Wolfenstein 3D's repetitive levels. Doom allowed competitive matches between multiple players, termed "deathmatches", and the game was responsible for the word's subsequent entry into the video gaming lexicon. The game became so popular that its multiplayer features began to cause problems for companies whose networks were used to play the game. Doom has been considered the most important first-person shooter ever made: it was highly influential not only on subsequent shooter games but on video gaming in general, and has been available on almost every video gaming system since. Multiplayer gaming, which is now integral to the first-person shooter genre, was first achieved successfully on a large scale with Doom. While its combination of gory violence, dark humor and hellish imagery garnered acclaim from critics, these attributes also generated controversy from religious groups, with other commentators labelling the game a "murder simulator." There was further controversy when it emerged that the perpetrators of the Columbine High School massacre were fans of the game; the families of several victims later unsuccessfully attempted to sue id Software, among numerous other video game companies, claiming they inspired the massacre.
On the Macintosh, Bungie's 1994 release of Marathon, and its subsequent sequels, set the standard for first-person shooters on that platform. Marathon pioneered or was an early adopter of several new features such as vertical aiming and freelook, dual-wielded and dual-function weapons, versatile multiplayer modes (such as King of the Hill, Kill the Man with the Ball, and cooperative play), friendly NPCs, and a strong emphasis on storytelling in addition to the action. Star Wars: Dark Forces was released in 1995 after LucasArts decided Star Wars would make appropriate material for a game in the style of Doom. However, Star Wars: Dark Forces added several technical features that Doom lacked, such as the ability to crouch or look up and down, and also saw the player's view of their weapons move from the middle to the right-hand side of the screen, which eventually became standard in the genre. Apogee's Duke Nukem 3D, released in 1996, was "the last of the great, sprite-based shooters" winning acclaim for its humor based around stylised machismo as well as its gameplay. However, some found the game's (and later the whole series') treatment of women to be derogatory and tasteless.
Advances in 3D graphics: 1995-1999[]
In 1994, Sega's 32X release Metal Head was a first-person shooter mecha simulation game that used fully texture-mapped, 3D polygonal graphics. That same year, Exact released the Sharp X68000 video game Geograph Seal, a fully 3D polygonal first-person shooter that employed platform game mechanics and had most of the action take place in free-roaming outdoor environments rather than the corridor labyrinths of earlier first-person shooters such as Wolfenstein 3D. The following year, Exact released its successor for the PlayStation console, Jumping Flash!, which was similar but placed more emphasis on the platforming rather than the shooting. Descent (released by Parallax Software in 1995), a game in which the player pilots a spacecraft around caves and factory ducts, was a truly three-dimensional first-person shooter. It abandoned sprites and ray casting in favour of polygons and six degrees of freedom.
Shortly after the release of Duke Nukem 3D in 1996, id Software released the much anticipated Quake, originally envisioned as a sort of fantasy online world (the name Quake originally referred to a Thor-like character devised in the developers' earlier D&D sessions), where armies of players would fight each other in large persistent battles—much as would be seen in later MMORPGs like Lineage and Dark Age of Camelot. Like Doom, Quake was influential and genre-defining, featuring fast-paced, hellishly gory gameplay, but used 3D polygons instead of sprites. It was centered around online gaming and featured multiple match types still found in first-person shooter games today. It was the first game to have a significant following of player clans (though the concept had existed previously as a story element in the Mech Warrior series, and guilds had already become common in MUDs by that time), and would help spur the growth in popularity of LAN parties such as QuakeCon. The game's popularity and use of 3D polygonal graphics also helped to expand the growing market for video card hardware; and the additional support and encouragement for game modifications attracted players who wanted to tinker with the game and create their own modules.
The first landmark, best-selling console first-person shooter was Rare's GoldenEye 007, based on the James Bond film and released on the Nintendo 64 in 1997. Highly acclaimed for its atmospheric single-player levels and well designed multiplayer maps, it featured the ability to aim at a precise spot on the screen, a sniper rifle, the ability to perform headshots, and the incorporation of stealth elements. The game was originally envisioned as an on-rails light gun shooter before it ended up as an off-rails first-person shooter. According to creator Martin Hollis: "We ended up with innovative gameplay, in part because we had Virtua Cop features in a FPS: A gun that only holds 7 bullets and a reload button, lots of position dependant hit animations, innocents you shouldn’t kill, and an aiming mode. When you press R in GoldenEye, the game basically switches to a Virtua Cop mode. Perhaps more importantly following the lead from Virtua Cop, the game was filled with action. There was lots to do, with very few pauses."
Released in 1998, Tom Clancy's Rainbow Six started a popular trend of tactical first-person shooters, though it was not the first of its kind. It featured a team-based, realistic design and themes based around counter-terrorism, requiring missions to be planned before execution and in it, a single hit was sometimes enough to kill a character. Medal of Honor, released in 1999, started a long running proliferation of first-person shooters set during World War II.
Half-Life featured in-game scripted sequences rather than cut-scenes, and its protagonist, Gordon Freeman, remains silent throughout the whole game.
Valve's Half-Life was released in 1998, based upon Quake's graphics technology. Initially met with only mild anticipation, it went on to become an unprecedented commercial success. While previous first-person shooters had focused on visceral gameplay with comparatively weak plots, Half-Life had a strong narrative; the game featured no cut scenes but remained in the first-person perspective at all times. It featured innovations such as non-enemy characters (featured somewhat earlier in titles such as Strife) but did not employ power-ups. Half-Life was praised for its artificial intelligence, selection of weapons and attention to detail; and, along with its sequel Half-Life 2 (released in 2004), is consistently reviewed as one of finest examples of the genre.
Starsiege: Tribes, also released in 1998, was a multiplayer online shooter allowing more than 32 players in a single match. It featured team-based gameplay with a variety of specialized roles, and an unusual jet pack feature. The game was highly popular and later imitated by games such as the Battlefield series. Id's Quake III Arena and Epic's Unreal Tournament, both released in 1999, were popular for their frenetic and accessible online multiplayer modes; both featured very limited single player gameplay. Counter-Strike was also released in 1999, a Half-Life modification with a counter-terrorism theme. The game and later versions (the latest being Counter-Strike: Source, released in 2004) went on to become by far the most popular multiplayer first-person shooter and computer game modification ever, with over 90,000 players competing online at any one time during its peak. That same year, the shooter-based stealth game Metal Gear Solid: Integral included a first-person mode that allowed the whole game to be played from a first-person perspective.
Online wars and the return of the console: 2000-2006[]
At the E3 game show in 1999, Bungie unveiled a real-time strategy game called Halo; at the following E3, an overhauled third-person shooter version was displayed. Later in 2000 Bungie was bought by Microsoft, and Halo was revamped and released as a first-person shooter, one of the launch titles for the Xbox console. It was a runaway critical and commercial success, and is considered a premier console first-person shooter. It featured narrative and storyline reminiscent of Bungie's earlier Marathon series but now told largely through in-game dialog and cut scenes. It also received acclaim for its characters, both the protagonist, Master Chief and its alien antagonists. The sequel, Halo 2 (2004), brought the popularity of online-gaming to the console market through the medium of Xbox Live, on which it was the most played game for almost two years. Deus Ex, released by Ion Storm in 2000, featured a levelling system similar to that found in role-playing games; it also had multiple narratives depending on how the player completed missions and won acclaim for its serious, artistic style. The Resident Evil games Survivor in 2000 and Dead Aim in 2003 attempted to combine the light gun and first-person shooter genres along with survival horror elements. Metroid Prime, released in 2002 for the Nintendo GameCube, a highly praised console first-person shooter, incorporated action adventure elements such as jumping puzzles and built on the Metroid series of 2D side-scrolling platform-adventures. The game is credited for popularizing "exploration, puzzle-solving, platforming and story" in the genre, for "breaking the genre free from the clutches of Doom," and for taking a major "stride forward for first-person games."
World War II Online, released in 2001, featured a persistent and "massively multiplayer environment", although IGN said that "the full realization of that environment is probably still a few years away." Battlefield 1942, another World War II shooter released in 2002, featured large scale battles incorporating aircraft, naval vessels, land vehicles and infantry combat. In 2003, PlanetSide allowed hundreds of players at once to compete in a persistent world, and was also promoted as the "world's first massively multiplayer online first person shooter." Doom 3, released in 2004, placed a greater emphasis on horror and frightening the player than previous games in the series and was a critically acclaimed best seller, though some commentators felt it lacked gameplay substance and innovation, putting too much emphasis on impressive graphics. In 2005, a film based on Doom emulated the viewpoint and action of a first-person shooter, but was critically derided as deliberately unintelligent and gratuitously violent.
2004's Vampire: The Masquerade – Bloodlines would develop a cult following by combining elements of first-person shooters with White Wolf's table-top role-playing game (similar to Deus Ex in 2000), despite suffering from a number of technical problems and selling poorly. In 2005, F.E.A.R. was acclaimed for successfully combining first-person shooter gameplay with a Japanese horror atmosphere. Later in 2007, Irrational Games' BioShock would be acclaimed by some commentators as the best game of that year for its innovation in artistry, narrative and design, with some calling it the "spiritual successor" to Looking Glass's earlier System Shock. Finally, the Crytek games Far Cry (2004) and Crysis (2007) as well as Ubisoft's Far Cry 2 (2008) would break new ground in terms of graphics and large, open-ended level design, whereas Call of Duty 4: Modern Warfare (2007), Resistance: Fall of Man (2006) and its sequel Resistance 2 (2008) presented increasingly refined linear levels and narratives, with the fast pace and linearity of the Call of Duty games bearing a resemblance to rail shooters. As of 2006, the first-person shooter was one of the biggest and fastest growing video game genres in terms of revenue for publishers.
Recent innovations: 2006-present[]
In recent years, first-person shooters have adopted elements from other shooter subgenres. An example of this is the linearity of rail shooters that has been adopted to a certain extent by first-person shooters such as the Call of Duty series to provide a more fast-paced and cinematic experience. Another example is the cover system, which was previously used in light gun shooters such as Time Crisis (1995), stealth games such as Metal Gear Solid 2: Sons of Liberty (2001), and third-person shooters such as WinBack (1999) and Kill Switch (2003). In 2006, Tom Clancy's Rainbow Six: Vegas introduced the cover mechanic to first-person shooters, where initiating cover leads to the viewpoint switching from a first-person perspective to a third-person over-the-shoulder perspective, a viewpoint similar to the third-person shooters Resident Evil 4 (2005) and Gears of War (2006). In 2007, Time Crisis 4 introduced a first-person shooter mode that incorporates the first-person cover system of its predecessors. In 2008, Brothers in Arms: Hell's Highway used a similar approach to Rainbow Six: Vegas, switching from first-person to third-person view when taking cover. On the other hand, Killzone 2 in 2009 implemented a cover system that always remains in first-person view. That same year, Call of Juarez also featured a cover system. A more recent third-person shooter element adopted by first-person shooters is the 'slide-boost' cover system mechanic, introduced by the third-person shooter Vanquish in 2010, which allows players to 'slide' in and out of cover at high speeds. Since then, several first-person shooters released in 2011 have incorporated similar slide-boost mechanics, including Bulletstorm, Crysis 2, and Killzone 3.
The addition of 3D television and stereoscopic games designed specifically for 3D systems, such as games like Killzone 3, is considered an evolution for the genre. With stereoscopic 3D, first-person shooters take on a new feel during gameplay due to the increased visual effects created from the 3D screen. The Nintendo 3DS handheld takes this concept further with autostereoscopic 3D, which doesn't require the use of 3D glasses and can be used in conjunction with the device's touchscreen and motion sensing capabilities.
The use of motion detecting game controllers, popularized by the release of the Wii in 2006, is considered an evolution for the genre on consoles due to allowing greater precision than conventional input devices. However, despite the Wii Remote's greater precision (for which it is widely used with light gun shooters), its limitations when it comes to camera control remains a challenge for developers that has prevented its widespread use among first-person shooters. The GunCon 3 peripheral used with Time Crisis 4's first-person shooter mode resolves this by featuring two analog sticks for moving and camera control in addition to aiming with the gun. This is also no longer an issue for the Nintendo 3DS, which uses a gyroscope and motion sensor to change the viewpoint on screen as the handheld is moved around, as has been demonstrated for the upcoming 3DS first-person shooter remake Galaga 3D Impact. Other upcoming first-person shooters for the 3DS include Resident Evil: The Mercenaries 3D and The Conduit 3DS, both of which allow switching between first-person and third-person perspectives.
In 2010, researchers at Leiden University showed that playing first-person shooter video games is associated with superior mental flexibility. Compared to non-players, players of such games were found to require a significantly shorter reaction time while switching between complex tasks, possibly because they are required to develop a more responsive mindset to rapidly react to fast-moving visual and auditory stimuli, and to shift back and forth between different sub-duties. A recent unique take on the genre is Second Person Shooter Zato, an experimental 'second-person shooter' released by Japanese indie developer Himo in 2011. It uses a 'second-person' perspective to display the game from the viewpoint of the enemies looking at the player, rather than the other way around, and makes use of a split screen to show the perspectives of multiple enemies. The game's perspective was inspired by surveillance cameras, while the title takes its name from Zatoichi due to the player character's inability to see.