These are all the games I've played:

ZX Spectrum Games

Too many to list!

Atari ST Games

Too many to list!

PC Games (incomplete list)

Aliens vs Predator
Alone in the Dark
Baldur's Gate
Baldur's Gate II
Black and White
Bloodrayne
Civilisation
Counter Strike
Cannon Fodder
Comanche
Commander Keen
Diablo
Diablo II
Doom
Doom II
Delta Force - Land Warrior
Descent
Deus Ex
Dune
Dune 2
Dungeon Keeper
Dungeon Keeper 2
Dungeon Siege
Duke Nukem
Duke Nukem 3D
Eye of the Beholder
Evolution
Giants - Citizen Kabuto
GTA
GTA 2
GTA 3
Half Life
Half Life - Oposing Force
Half Life - Blue Shift
Heretic
Heretic II
Heroes of Might and Magic III
Lemmings
Might and Magic V
Might and Magic VI
Might and Magic VII
Morrowind
Neverwinter Nights
NOX
Outcast
Return to Caslte Wolfenstein
Rune
Splinter Cell
Theif - Dark Project
Ultima Underworld
Untima 7
Untima 8
Unreal Tournament

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