These titles may not be exclusive to the system I list them with, they just happen to be the systems I played the game on.
IBM mainframe (1980) = D&D, an original version written by a programmer that worked with me.
Atari 2600 = Adventure
Intellivison = D&D, Baseball, Football
Commodore 64 = The Hitchhiker's Guide to the Galaxy, Zork
Apple IIC = F-15 Strike Eagle, Wizardry: Proving Grounds of the Mad Overlord, Castle Wolfenstein
NES = Mario, Link, Punch-Out. Never got into Tecmo.
Super Nintendo = The Legend of Zelda: A Link to the Past
Nintendo 64 = GoldenEye 007, a tank game I can't remember the name
Then Xbox and PS, were not calling those classics yet are we?
Early PC games were, Leisure Suit Larry, Zork, Wolfenstein 3D, Civ games, my first MMO Red Baron, Perfect General.
I was about to post this a week ago, got banned, saved it to Word, forgot about it until now, and pasted.