So Played ~50%, most of those are great games.X-COM UFO Def, X-Com TFTD, Syndicate, Grand Theft Auto, Command & Conquer, Red Alert, Diablo, Diablo 2 LoD, Star Craft, Descent 2, One Must Fall 2097, Worms, Worms 2, Lemmings, Lemmings 2, Earthworm Jim, Duke Nukem, Duke Nukem 2, Duke Nukem 3D, Rise of the Triad, Doom, Doom 2, Quake, Heretic, Hexen, Mechwarrior, Mechwarrior 2, Warcraft: Orcs and Humans, Death Rally, Destruction Derby, Carmageddon, and Hi-Octane, Sim Tower, Sim City 2000, Baldies, Jazz Jackrabbit, Jazz 2, Battle Isle, Battle Isle '93, Battle Isle 2220, Scorched Earth, Redneck Rampage, Blood, Bio Menace, Corridor 7, Terminal Velocity, Total Annihilation, Battle Chess, Rollercoaster Tycoon 2, Jagged Alliance.
My game is Beneath A Steel Sky (available with SCUMMVM). I play it around once a year. It's a point and click adventure set in a dystopian future, so nothing changes from play to play, but I enjoy it so much I have to give it a play each year.