Heres all the games i've rated 8+ at gamespot:
9.5 System Shock 2
9.4 Dreamfall: The Longest Journey
9.4 The Longest Journey
9.3 Need for Speed Most Wanted
9.3 Counter-Strike: Source
9.2 Half-Life 2
9.2 Mafia
9.2 Battlefield 2
9.1 Max Payne 2: The Fall of Max Payne
9.1 Max Payne
9.1 Star Wars: Knights of the Old Republic
9.1 Warhammer 40,000: Dawn of War
9.1 World of Warcraft
9 Brothers in Arms: Road to Hill 30
9 Call of Duty
8.9 Vampire: The Masquerade - Bloodlines
8.9 Day of Defeat: Source
8.8 Clive Barker's Undying
8.7 Halo: Combat Evolved
8.7 Doom 3
8.2 Star Wars Knights of the Old Republic II: The Sith Lords
8.2 Psychonauts
8.1 Deus Ex: Invisible War