I use to be really big into "Robot Auto Racing Sim" (~ 12 years ago): http://rars.sourceforge.net/ http://rars.sourceforge.net/ You would write all the logic o

I use to be really big into "Robot Auto Racing Sim" (~ 12 years ago): http://rars.sourceforge.net/ http://rars.sourceforge.net/ You would write all the logic of your car in a single C program and then race it against others. It had a visual so you could watch the race or just see the results. At the time I thought the physics engine was pretty realistic, not sure what I would think if I went back to it now though. It was a blast to play with friends.