Top 12 (and alternate 12) Favorite Games of All Time

As the title says, what are your top 12 favorite games?
And also, what are your 12 alternates?Here's my list:1. Super Mario World
1a. Super Mario Bros. 3
2. Sonic the Hedgehog 2
2a. Sonic 3 %26 Knuckles
3. The Legend of Zelda: Ocarina of Time
3a. The Legend of Zelda: A Link to the Past
4. Quake
4a. Quake III Arena
5. Mortal Kombat II
5a. Mortal Kombat Trilogy
6. Unreal Tournament 2004
6a. Unreal Gold
7. Street Fighter II Turbo
7a. Street Fighter Alpha 3
8. DOOM
8a. DOOM 3
9. Halo 2
9a. Halo: Combat Evolved
10. Oddworld: Abe's Exoddus
10a. Oddworld: Abe's Oddysee
11. Thief: The Dark Project
11a. Thief: Deadly Shadows
12. Mega Man II
12a. Mega Man VIIThere's my 24 games. Now what's yours?