Computer game bot

A bot, most prominently in the first-person shooter types (FPS), is a type of weak AI expert system software which for each instance of the program controls a player in deathmatch, team deathmatch and/or cooperative human player. Computer bots may play against other bots and/or human players in unison, either over the Internet, on a LAN or in a local session.Features and intelligence of bots may vary greatly, especially with community created content. Advanced bots feature machine learning for dynamic learning of patterns of the opponent as well as dynamic learning of previously unknown maps – whereas more trivial bots may rely completely on lists of waypoints created for each map by the developer, limiting the bot to play only maps with said waypoints. Using bots is incidentally against the rules of all of the current main Massively multiplayer online role-playing games (MMORPGs).

In Multi-User Domain games (MUDs), players may utilize bots to perform laborious tasks for them, sometimes even the bulk of the gameplay. While a prohibited practice in most MUDs, there is an incentive for the player to save his/her time while the bot accumulates resources, such as experience, for the player character.

Aim Bot
An aimbot (sometimes called "auto-aim") is a type of computer game bot used in first-person shooter games to provide varying levels of target acquisition assistance to the player. It is sometimes incorporated as a feature of a game (where it is usually called "auto-aim" or "aiming assist"). However, making the aim-bot more powerful in multiplayer games is considered cheating, as it gives the user an advantage over unaided players.

Aimbots have varying levels of effectiveness. Some aimbots can do all of the aiming and shooting, requiring the user to move into a position where the opponents are visible; this level of automation usually makes it difficult to hide an aimbot—for example, the player might make inhumanly fast turns that always end with his or her crosshairs targeting an opponent's head. Numerous anti-cheat mechanisms have been employed by companies such as Valve to prevent their use and avoid the accusations.

Some games have "auto-aim" as an option in the game. This is not the same as an aimbot; it simply helps the user to aim when playing offline against computer opponents usually by slowing the movement of 'looking/aiming' while the crosshair is on or near a target. It is common for console FPS games to have this feature to compensate for the lack of precision in analog-stick control pads.

Credits to:
http://gamebots.sourceforge.net/
http://mmohuts.com/review/bots