Lode Runner (C64, Apple II, others)
Times of Lore (C64, Amiga)
Space Taxi (C64)
Test Drive II: the duel (C64, Amiga, others)
Ultimate Wizard (C64)
Cannon Fodder (Amiga, others)
Lemmings (Amiga, others)
Prince of Persia (Apple II, Amiga, others)
Pinball Dreams (Amiga)
The Fool's Errand (Mac)
I have console favorites as well, but I thought I'd try to nominate some computer stuff