I have a vast collection of Role-Playing Games, some of which I’ve never even played. Call it a hobby (or a sickness!). The ones I’ve played are bold.
Aces & Eights
AD&D 1st Ed.
AD&D 2nd Ed.
Arcana Evolved (I also have Arcana Unearthed)
BattleTech: A Time of War
Bulldogs! Sci-Fi That Kicks Ass
Call of Cthulhu, 5th Edition
D&D (Rules Cyclopedia; Moldvay Basic/Expert; Mentzer Basic, Companion and Masters sets)
D&D 4E Essentials
D&D, 5th Edition
Doctor Who: Adventures in Time & Space
Doctor Who (FASA)
Gamma World (the latest edition based on D&D 4E)
HackMaster (Basic/HackMaster 5th edition)
Hollow Earth Expedition
Metamorphosis Alpha, 1st edition
Mutant: Year Zero
Mutants & Masterminds, 2nd edition
Paranoia (formerly known as XP)
Paranoia 2nd Edition
Savage Worlds Explorer’s Edition
Shadowrun 20th Anniversary Edition
Shadowrun 5th Edition
Space 1889 (Ubiquity edition)
Star Trek (FASA)
Star Wars (WEG D6)
Star Wars: Edge of the Empire
Star Wars: Age of Rebellion
Star Wars: Force & Destiny
Star Wars Saga Edition
Top Secret S/I
Of course, I have preferences within this list. Running Paranoia, 2nd edition at conventions is practically a tradition for me, and the West End Games version of the Star Wars Roleplaying Game is one of the great loves of my gaming life. I started, like so many others of my generation, with D&D.