Comment PONG! (Score 1) 437
Surprised Pong wasn't mentioned at all. If not for Pong, where would the computing (graphical) gaming industry be?
If you don't mind opening it up a little, remove the whole cover -- screen et al. Hook up an external monitor and you have a Commodore-64-looking PC. (OK, not quite the same looks, but you get the drift)
After all is said and done, a hell of a lot more is said than done.