Just RPGS:
D&D: 2E, 3E, 3.5E, 4E, Basic
Call of Cthulhu: 3rd, 5th
World of Darkness: Vampire, Werewolf, Mage, Changeling, Wraith (during the 90s...whatever editions those where)
Legend of the Five Rings: 1st, 2nd
Heavy Gear
Shadowrun (forget edition)
Earthdawn (2nd?)
Top Secret
Gamma World
d20...