Retail:
Assassin's Creed
Assassin's Creed II
Batman: Arkham Asylum
Dead Space
FIFA 10
Fight Night Round 3
Gears of War
Gears of War 2
Halo 3
Halo 4
Halo: Reach
Kung Fu Panda
L.A. Noire
LEGO Indiana Jones: Original Adventures
Marvel vs. Capcom 3: Fate of Two Worlds
Mass Effect
Mass Effect 2
Medal of Honor
Red Dead Redemption
SEGA Mega Drive Ultimate Collection
Sherlock Holmes vs Jack the Ripper
Street Fighter x Tekken
The Elder Scrolls IV: Oblivion
The Orange Box
The Testament of Sherlock Holmes
Trivial Pursuit
Arcade/Windows phone/Win8:
Aegis Wing
Dash of Destruction
Dead Space: Ignition
Doritos Crash Course
Fruit Ninja (WP)
Harm's Way
IonBallEX (WP)
Kinectimals (WP)
Limbo
Microsoft Minesweeper (Win 8)
Microsoft Solitaire Collection (Win 8)
Minesweeper (WP)
Monday Night Combat
Mortal Kombat Arcade Kollection
Pac-Man: Championship Edition DX (WP)
Skullgirls
Sonic and Knuckles
SoulCalibur
Super Street Fighter 2 Turbo HD Remix
Torchlight
Toy Soldiers: Boot Camp (WP)
Trials HD
Virtua Fighter 5: Final Showdown
X-Men Arcade
Then there's some games i've completed the main game, like Arkham City, Black Ops, Mass Effect 3 and Trials Evolution, but i like to think the game is not completed without the dlc.
Too bad i don't have much time for achievement hunting nowadays
This thread is dying! Maybe we need a general achievement/game progress thread rather than narrowing it down to just 100% completions which most people don't go for (even I only go for it when it's straightforward or a great game).
Yeah, general achievement thread might be a better idea.