Some games, if multiplayer and a bot is put in, can use paths learned by human players to appear more human. We did some of this for racing games which really

Some games, if multiplayer and a bot is put in, can use paths learned by human players to appear more human. We did some of this for racing games which really have pretty easy AI when compared with character games or strategy. An example is take ghost runs from real players, essentially splines from real players good and bad, but adjust the runtime play to the current vehicles but try to run that line. That way runs appear more human and probably can't be replicated by AI as well. For racing there is also the typical rubber banding AI which tunes to the runtime play[1]. Most AI in games really come down to just scripts and action recipes. Zone based events/actions, path passed actions/events, follow/ranged/staged reactions, global actions/events, AI directors that can tune the game to the player or difficulty dynamically etc. Left for Dead probably has the best AI director out there for tuning some great co-op games[2]. It does med drops, weapons, enemies appearing all based on the current state of the players and skill. Music also changed per player based on their situation and intensity of that situation. The Director, sometimes referred to as the AI Director, or simply as AID is the artificial intelligence of Left 4 Dead that features a dynamic system for game dramatics, pacing, and difficulty. Instead of set spawn points for enemies, the Director places enemies in varying positions and numbers based upon each player's current situation, status, skill, and location, creating a new experience for each play-through. The Director also creates mood and tension with emotional cues such as visual effects, dynamic music and character communication. Moreover, the Director is responsible for spawning additional health, ammo, weapons, and Special Infected, like the Witch or the Tank. It should be noted that there is another Director in the game, which controls the music on a per-player scale, called the Music Director. [1] http://www.giantbomb.com/rubber-band-ai/3015-35/ http://www.giantbomb.com/rubber-band-ai/3015-35/ [2] http://left4dead.wikia.com/wiki/The_Director http://left4dead.wikia.com/wiki/The_Director