Sorted alphabetically:

• Civilization IV
• Driver 2
• Enemy Territory: Quake Wars
• Final Fantasy X
• Final Fantasy XIII
• Metal Gear Solid
• Metal Gear Solid 2: Sons of Liberty
• Spear of Destiny
• Wolfenstein 3D
• Wolfenstein: Enemy Territory

I'd so love to put games like Final Fantasy IV-IX there but I've yet to play them despite owning them... I never seem to find the time for them. Then there's some other RPGs and adventure games that share the same fate. In general, I have too little time for all the games I own (as well as many games I don't own). Also, the first Assasin's Creed and Uncharted just missed the list, they were very close. It's not that they're that great, there just aren't that many 'great' games. The only easy choices on my list were FF, MGS, W:ET and to a lesser extent, Civ IV. The others had to fight to get their names on the list.

1. Planetscape Torment

The rest in no order:

Fallout 3

Super Mario Bros 3

The Legend of Zelda Ocarina of time

Metal Gear Solid 3

Goldeneye 007

Halo 1

Elder Scrolls III Morrowind

Deus X

Final Fantasy 13