Artificial Intelligence Programs Kill Each Other In 'DOOM'

We can all agree that teaching artificially-intelligent robots how to arm themselves with rocket launchers and create a murder carnival is just a fantastic idea. But these robots aren't ready to be let loose outside our front door (yet). They need to train first. So we're ready if Hitler comes back as a robot, of course. Or perhaps because the influential 1993 game has simple 3D maps and multiple gameplay styles, which makes it a handy touchstone for AI research.