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
Doctor Who: Adventures in Time & Space
Gamma World (the latest edition based on D&D 4E)
HackMaster (Basic/HackMaster 5th edition)
Hollow Earth Expedition
Mutants & Masterminds (2nd ed.)
Paranoia (formerly known as XP)
Paranoia 2nd Edition
Savage Worlds Explorer’s Edition
Shadowrun 4th Edition & 20th Anniversary Edition
Star Wars (WEG D6)
Star Wars: Edge of the Empire BETA
Star Wars Saga Edition
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.