There was this really cool game a couple years ago:
rawbots.net that let you create and program all sorts of robots. You could create awesome scenarios and just have a blast, even if you completely sucked at the complex programming system. You could download bots online and such.
Though over the past year and a half the devs haven't posted any updates for the game. They went bankrupt and had to start working for other companies to get the necessary profits to make the game possible. It is looking pretty dead right now, but with some extra community attention the game could revive itself.
