Balance of power is a strategy game where one must lead a superpower nation to avoid war. It was ported to the Mac, Apple II, Windows, Atari ST, and Amiga.
The Hitchhiker's Guide to the Galaxy is a text based interactive fiction game where you play the part of Arthur Dent, who begins an exciting and confounding space journey right as the world ends.
IBM TV and Cinema 101 "Trivia from Talkies to Trekkies" is a trivia quiz game with over 5000 challenging questions about TV and Movies.
Moon Shuttle is an invasion style game for the Atari 400/800 computer.
Planetfall, by Infocom, is a text-based interactive game where you explore an alien planet after your ship, where you are assigned to scrub floors, mysteriously explodes.