EGATrek. Be a Starfleet captain! Blow up enemy ships! Do the Janeway Maneuver (aka genocide)!
LifeGenesis. The Life emulator, as a game. Am I the only person who liked this thing? Probably.
Nirvana. A text adventure game in which you must stop an evil sorceress from enchanting any more young men. I honestly thought I dreamed this game until I found it again.