I played Qix on VAX 8600
I played Qix on an Atari 800. That game used to drive me crazy. It made me madder than any other computer enterprise I've ever undertaken, except for getting Word to autonumber correctly.
I don't know how many computer science majors flunked out because of 'HACK' on the unix box, but I know that you could log on (using the super speed 300 baud modem) at 3:00am and there would always be a few (usually the same) playing. I did love that game, and my son with his xbox still talks fondly of the experience.