FPS

First-person shooter (FPS) is a genre of video games which is characterized by an on-screen view that simulates the in-game character's point of view and a focus on the use of handheld ranged weapons. FPS is also a term used by tactical response teams as the person who shoots first.
The modern FPS genre emerged at the point when home computers became sufficiently powerful to draw basic 3D graphics in real time. id Software's Wolfenstein 3D and Doom are widely considered to be the breakthrough games of the genre . The latter in particular, defined the genre so emphatically that FPS games were commonly referred to as "Doom clones" or "Doom-likes" for a significant period after its release.
First-person shooters have been subject to substantial controversy due to the levels of violence included in most games. The level of realism is increased when the video game world is seen through the first-person perspective.
The first-person shooter is a sub-genre of shooter games. Many other shooter genres, such as on-rails shooters, are viewed from a first-person perspective, while flight simulators frequently involve the use of weapons; however, these are not considered FPSs. In the early 1990s, the term came to define a more specific type of game with a first-person view, where the main character's gun and part of his/her hand is shown, almost always centered around the act of aiming and shooting handheld weapons, usually with limited ammunition. The focus is generally on the aiming of one's own guns and the avoidance of enemy attacks, but the player is given more control over their movement than in on-rails shooters and most light gun games.
Many third-person shooters (where the player sees the game world from a viewpoint above and behind the main character) are commonly treated as first-person shooters, due to similarities in gameplay. In some cases (for example, Unreal Tournament 2004, Command & Conquer: Renegade, Star Wars Battlefront II, Oddworld: Stranger's Wrath or Duke Nukem 3D) it is possible to toggle the game between viewpoints and play the entire game from either perspective.
More frequently, a first-person view will be adopted in a third-person game only for brief periods for certain situations when it is advantageous. Since a first-person view usually allows more precise refinement of a player's aim than most third-person aiming systems, many third-person shooters allow the player to switch to their avatar's viewpoint in order to fire a weapon; sometimes, as in the first Metal Gear Solid title and Grand Theft Auto III, this may only be done when specific weapons (a sniper rifle, for example) are equipped. In addition, certain third-person shooters such as Burning Rangers let the player switch to a first-person perspective in order to observe their surroundings, but do not allow them to shoot any weapons while using it. Some first-person games switch by default to a third-person view when a melee weapon, such as a sword or a lightsaber, is selected (as in LucasArts' Jedi Knight) on the theory that a wider perspective makes those weapons easier to manage.

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