Baldur's Gate + Tales of the Sword Coast - RPG
Baldur's Gate II + Throne of Bhaal - RPG
Icewind Dale + Heart of Winter & Trials of the Luremaster - RPG
Icewind Dale II - RPG
Planescape Torment - RPG
Neverwinter Nights + Shadows of Undrentide & Hordes of the Underdark - RPG
Neverwinter Nights 2 + Mask of the Betrayer & Storm of Zehir + Mysteries of Westgate - RPG
TES III: Morrowind - RPG
TES IV: Oblivion - RPG
TES V: Skyrim - RPG
Homeworld - RTS
Homeworld 2 - RTS
Kohan + Ahriman's Gift - RTS
Kohan 2 - RTS
Starcraft + Broodwar - RTS
Starcraft 2 - RTS
Back to the Future Episodes 1 - 5 - Hidden item game, it's BttF and it extends the plot though.
Dragonshard - RTS
Total Annihilation - RTS
Total Annihilation: Kingdoms - RTS
Heroes of Might and Magic V + Hammers of Fate & Tribes of the East - RTS
Forgotten Realms: Demon Stone - Action Game/RPG
Prince of Persia: Forgotten Sands - Action
Ys (Anything that's gotten a translation patch) - Action
Chaos Legion - Action
Devil May Cry 3 - Action
Command and Conquer: Tiberian Sun - RTS
The Last Remnant - RPG - The battle system takes a little adjusting to.
Unreal Tournament (Any) - FPS
Sonic Generations - Action
Deus Ex: Human Revolution - Action/RPG
Crysis + Warhead - FPS
Duke Nukem Forever - FPS
There are a LOT of mods for BG/BGII, I highly recommend you get Baldur's Gate Trilogy. BGT lets you play BG in the BGII engine (better resolution/graphics) and play through BG right to the end of Throne of Bhaal without having to switch games. Neverwinter Nights (and 2) has a bunch of modules, many of which are very fun.
I made this post without realizing it might be a bot, I blame it on being tired

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