Video games before 1974 used multiplayer or discrete logic to give players a challenging experience. Several games, like Atari’s Qwak and Pursuit introduced artificial intelligence into video games, using the extremely limited computing power to perform simple actions. Games like the text-based Star Trek game used scripted events and enemies to create the illusion of intelligent enemies. The first complex AI came in the ghosts chasing after Pac-Man, each with their own patterns responding to the player forcing the player to memorize complex patterns to beat each level.