A shareware game called begin was released in 1984: a tactical starship game with a good AI and fair rules (the computer had no advantage) I've hacked assembly code to make it a multiplayer game, so that folk can challenge each other rather than the AI.
Project CodeRacers is a game geared for creative java programmers. It's main idea is that each player will create an own AIagent (the so-called "driver"). The user's driver then will compete against other players' drivers in a simulated car race.