Streets of Rage
Sonic the Hedgehog 1-3
Super Mario Bros. 1-3
Pokemon Red, Yellow, Blue, Gold, Silver
Medal of Honor
Legend of Zelda: Link's Awakening, Oracle of Seasons, Ocarina of Time (and Master Quest), Majora's Mask, Twilight Princess
Star Wars: Shadow of the Empire
Golden Sun I and II
Spyro
Jak and Daxter
Final Fantasy X
Kingdom Hearts I and II
God of War I and II
Azurik
Prince of Persia Sands of Time, Warrior Within, Two Thrones (and Rival Swords)
Grand Theft Auto III, San Andreas, IV
Fable I and II
Red Dead Revolver, Redemption
The Elder Scrolls: Morrowind
Star Wars Jedi Knight II: Jedi Outcast
Star Wars Jedi Knight: Jedi Academy
Star Wars: Knights of the Old Republic
Star Wars: Battlefront I and II
Half-Life I and II
Portal
BioShock I and II
Crackdown
Gears of War I and II
Fallout 3
Dark Sector
Overlord
Star Wars: The Force Unleashed
Assassin's Creed I and II
Halo 1-3 and ODST
Batman: Arkham Asylum
Army of Two

Uh, that's all in order-ish. For some of the sequels I just threw them in with the previous titles so it's mostly in order. There's probably a lot I missed but those are the ones that first came to mind. P