The "Complete" List

Resistance 2
Mirror's Edge - 360
Quantum of Solace - 360
House of the Dead: Overkill - Story & Directors Cut
Fable 2 - Story Mode
Metal Gear Solid 4: Guns of the Patriot - (Liquid Easy)
Wario Ware: Smooth Moves
Saints Row
Race Pro - Career Mode
50 Cent: Blood on the Sand (Easy) - 360
Conan (Easy) - PS3
GTA IV - 360
Ratchet & Clank: Tools of Destruction
Uncharted: Drake's Fortune
Manhunt 2
Prince of Persia
No More Heroes - Real Ending
GTA: Chinatown Wars
Silent Hill 2 - (4 star rating, Leave ending)
Lego Star Wars: The Complete Saga - DS
Silent Hill 3 - (5 star rating)
Little Big Planet - Story Mode
Legend of Zelda: The Phantom Hourglass
Batman: Arkham Asylum
Killzone 2
WET
Halo 3: ODST - (Legendary)
DiRT 2 - 100%
Halo 3* - (Legendary)

Not a first time completion but a serious step up in difficulty.. Fortunately I had some help as we did it in a single sitting in co-op.

Personally, fun as the game is, I really can't see why it's so popular.