Hunt the Wumpus (Gregory Yob)
Adventure for the Atari2600 by Warrren Robinett
Anything by Adventure International for the TRS-80 (A.I./Scott Adams)
Zork (Infocom)
Enchanter (Infocom)
Starflight (Binary Systems;Electronic Arts)
Bolo (Stuart Cheshire)
Escape Velocity (Ambrosia Software)
Marathon (Bungie)
Command and Conquer (a Bolo knockoff =) (Westwood Interactive)
Age of Empires (Ensemble Studios (Series))
Alpha Centauri (Sid Meier;Firaxis)
Riven (Cyan)

~ We are not the sum total of our species. We are a variable in a longer equation. We are on our way, genetically, to another place.