Take a look at the Top 25 below and see if your favorites made the list.
1. Tetris - PC (1985)
2. Legend of Zelda: Ocarina of Time - N64 (1998)
3. Doom - PC (1993)
4. Super Mario World - SNES (1991)
5. Guitar Hero - PS2 (2005)
6. Street Fighter II - SNES (1991)
7. Super Mario Kart - SNES (1992)
8. Goldeneye 007 - N64 (1997)
9. Grand Theft Auto IV - PS3 and Xbox 360 (2008)
10. Metal Gear Solid - PlayStation (1998)
11. Halo: Combat Evolved - Xbox 360 (2001)
12. Super Mario Galaxy - Wii (2007)
13. Final Fantasy VII - PlayStation (1997)
14. Resident Evil 4 - GameCube (2005)
15. Chrono Trigger - SNES (1995)
16. Gran Turismo - PlayStation (1998)
17. Sim City - Macintosh and Amiga (1989)
18. Half-Life - PC (1998)
19. Sid Meier's Civilization II - PC (1996)
20. Gears of War - Xbox 360 (2006)
21. Starcraft - PC (1997)
22. Super Metroid - SNES (1994)
23. Deus Ex - PC (2000)
24. Tony Hawk's Pro Skater 2 - PlayStation (2000)
25. Shadow of the Colossus - PS2 (2005)
Nos. 26-50 available here.