[AlStrong]

Xbox 360

50 Cent = 1280x720 (no AA)
Afro Samurai = 1280x720 (4xAA)
Alan Wake = 960x544 (4xAA) - As per gamefest presentation
Aliens Vs Predator = 1120x630 (custom AA)
Alone in the Dark = 1040x600 (2xAA)
Army of Two = 1280x720 (2xAA)
Assassin's Creed = 1280x720 (2xAA)
Assassin's Creed 2 = 1280x720 (2xAA)
Avatar = 1280x696 (2xAA, black borders)
Backbreaker = 1152x640 (2xAA + blur filter)
Banjo Kazooie: Nuts and Bolts = 1280x720 (2xAA)
BlazBlue: Calamity Trigger = 1280x720 (2xAA background, no AA characters )
Batman: Arkham Asylum = 1280x720 (2xAA)
Battle Fantasia = 1280x720 (no AA, toggable blur filter)
Battlefield: Bad Company = 1280x720 (no AA)
Battlefield: Bad Company 2 = 1280x720 (no AA)
Bayonetta = 1280x720 (no AA)
Beijing 2008 = 1280x720 (2xAA)
Beowulf = 1280x720 (4xAA)
Bionic Commando = 1120x640 (no AA)
Bioshock = 1280x720 (no AA)
Bioshock 2 = 1280x720 (edge blur filter)
Blacksite: Area 51 = 1280x720 (2xAA)
Blue Dragon = 1280x720 (2xAA)
Blur = 1280x720 (4xAA)
Borderlands = 1280x720 (no AA)
Brutal Legend = 1200x720 (no AA)
Burnout: Paradise = 1280x720 (2xAA)
Call of Duty 3 = 1040x624 (2xAA)
Call of Duty: Modern Warfare = 1024x600 (2xAA)
Call of Duty: Modern Warfare 2 = 1024x600 (2xAA)
Call of Duty: World at War = 1024x600 (2x AA)
Call of Juarez: Bound in Blood = 1280x672 (4x2 custom edge AA + black borders)
Cars Mater-National = 1280x720 (4xAA)
Club, The = 1280x720 (4xAA)
Command & Conquer: Red Alert 3 = 1280x720 (no AA, blur filter)
Conan = 1024x576 (no AA)
Condemned 2 = 1280x720 (2xAA)
Conflict: Denied Ops = 1280x720p (2xAA)
Chronicles of Riddick: Dark Athena = 1280x720 (4xAA)
Crackdown = 1280x720 (2xAA)
Crash Time = 1280x720 (2xAA)
Dante's Inferno = 1280x720 (no AA)
Darkness, The = 1280x720 (4xAA)
Dark Sector = 1280x720 (no AA)
Darksiders = 1152x648 (no AA)
Dead or Alive 4 = 1280x720 (2xAA)
Dead or Alive Xtreme 2 = 1280x720 (2xAA)
Dead Rising = 1280x720 ( up to 4xAA depending on frame rate)
Dead Space = 1280x720 (no AA)
Dead to Rights: Retribution = 1088x612 (2xAA) ?
Devil May Cry 4 = 1280x720 (2xAA)
Dirt = 1280x720 (4xAA)
Dirt 2 = 1280x720 (4xAA)
Don King Prizefighter = 1024x630 (2xAA)
Dragon Age: Origins = 1280x720 (2xAA)
Dragon Ball: Raging Blast = 1280x720 (1x1 edge blur)
Dynasty Warriors 6 = 1280x720 (no AA)
Dynasty Warriors: Strike Force = 1280x720 (no AA)
Elder Scrolls IV: Oblivion = 1024x600 (2xAA) - Same for GOTY Edition!
End of Eternity/Resonance of Fate = 1088x720 (2xAA)
End War = 1280x720 (2xAA)
F.E.A.R. = 1280x720 (2xAA) + slight blur?
F.E.A.R. 2 = 1280x720 (2xAA)
Fable II = 1120x720 (blur filter, 2xAA)
Fable III =
FaceBreaker = 1280x720 (4xAA)
Fallout 3 = 1280x720 (4xAA, certain edges)
Fantastic Four: Rise of the Silver Surfer = 1280x720 (4xAA)
Far Cry 2 = 1280x696 (2xAA, black borders)
Fight Night Round 4 = 1280x720 (4xAA)
Fifa 2006 = 1024x576 (2xAA)
Fifa 2007 = 1200x675 (no AA)
Fifa 2008 = 1280x720 (2xAA)
Fifa 2010 = 1280x720 (2xAA)
Fifa Street 3 = 1920x1080 (4xAA)
Final Fantasy XIII = 1024x576 (2xAA)
Fracture = 1280x720 (no AA)
Forza Motorsport 2 = 1280x720 (2xAA in-game, 4xAA replay & vehicle select)
Forza Motorsport 3 = 1280x720 (2xAA in-game, 4xAA replay & vehicle select)
Gears of War = 1280x720 (HD), 960x720 (SD) (2xAA on static objects?)
Gears of War 2 = 1280x720 (2xAA, certain edges unaffected)
Ghostbusters = 1280x720 (2xAA)
Ghost Recon: Advanced Warfighter 2 = 1280x720 (2xAA)
G.I. Joe: The Rise of the Cobra = 1280x720 (2xAA)
Godfather II = 1280x720 (no AA)
Golden Axe: Beast Rider = 1280x720 (no AA, blur filter)
Golden Compass = 1280x720 (2xAA)
Grand Theft Auto IV = 1280x720 (2xAA)
Guitar Hero 3 = 1280x720 (no AA)
Guitar Hero Aerosmith = 1280x720 (no AA)
Guitar Hero World Tour = 1280x720 (no AA)
Guitar Hero 5 = 1280x720 (no AA)
Halo 3 = 1152x640 (no AA)
Halo 3: ODST = 1152x640 (no AA)
Halo: Reach =
Halo Wars = 1280x720 (2xAA)
HAWX = 1280x720 (4xAA)
IL2 Sturmovik = 1280x720 (2xAA)
Incredible Hulk = 1280x720 (full screen blur)
Juiced 2: Hot Import Nights = 1280x720 (2xAA)
Kung Fu Panda = 1280x720 (no AA)
Left 4 Dead = 1280x720 (no AA, edge blur)
Left 4 Dead 2 = 1280x720 (no AA, edge blur)
Legend of Spyro: Dawn of the Dragon, The = 1280x720 (4xAA)
Legendary = 1280x720 (no AA)
LEGO: Batman = 1280x720 (2xAA)
LEGO: Harry Potter 1-4 = 1280x720 (2xAA)
LEGO: Indiana Jones = 1280x720 (2xAA)
Lord of the Rings: Conquest = 1280x720 (no AA)
Lost Planet = 1280x720 (up to 4xAA dependent on framerate)
Lost Planet 2 = 1280x720 (2xAA)
Madden NFL '09 = 1280x720 (no AA)
Mafia 2 = 1280x720 (2xAA)
Marvel: Ultimate Alliance = 1280x720 (2xAA)
Marvel: Ultimate Alliance 2 = 1024x576 (2xAA)
Mass Effect = 1280x720 (2xAA, transparencies and effects not AA'd)
Mass Effect 2 = 1280x720 (2xAA, transparencies and effects not AA'd)
Mercenaries 2: World in Flames = 1280x720 (no MSAA, but depth/Z-based edge blur?)
Metro 2033 = 1280x720 (AAA)
Midnight Club: Los Angeles = 1280x720 (2xAA?)
Mirror's Edge = 1280x720 (2xAA)
MK vs DC = 1040x624 (2xAA)
MotoGP 2006 (screenshot) = 1280x1024 (framebuffer grab from AVS Forum member)
MotoGP 09/10 = 1280x720 (2xAA)
MX vs ATV: Untamed = 1280x720 (no AA)
MX vs ATV: Reflex = 1280x720 (no AA)
NBA Live '08 = 1280x720 (4xAA)
NBA Street Home court (demo) = 1920x1080 (4xAA)
NCAA Football 08 (demo) = 1024x600 (2xAA)
Need For Speed: Pro Street = 1280x720 (4xAA)
Need For Speed: Shift = 1280x720 (4xAA)
Need For Speed: Undercover = 1280x720 (4xAA)
NFL Tour = 1280x720 (4xAA, 60fps)
NHL '09 = 1280x720 (4xAA)
Ninja Bladen = 1280x720 (2xAA)
Ninja Gaiden 2 = 1120x584 (2xAA)
Operation Flashpoint 2 = 1280x720 (2xAA)
Orange Box, The = 1280x720 (no AA)
Overlord = 1280x720 (2xAA)
Overlord II = 1280x612 (custom edge blur, black borders)
Perfect Dark Zero = 1152x640 (no AA)
Phantasy Star: Universe = 1152x648 (no AA)
Prince of Persia = 1280x720
Prince of Persia: The Forgotten Sands = 1280x720 (2xAA)
Pro Evolution Soccer 6 (demo) = 1024x576 (2xAA)
Pro Evolution Soccer 2008 = 1280x720 (4xAA)
Pro Evolution Soccer 2010 = 1280x720 (2xAA)
Project Gotham Racing 3 = 1024x600 (2xAA)
Project Gotham Racing 4 = 1280x720 (2xAA)
Prototype = 1120x640 (2xAA)
Quake 4 = 1280x720 (no AA)
Quake Wars: Enemy Territory = 1280x720 (2xAA + blur)
Race Driver: GRID = 1280x720 (4xAA)
Race Pro = 1280x720 (4xAA)
Rainbow Six Vegas 2 = 1280x720 (2xAA)
Red Dead Redemption = 1280x720 (2xAA)
Red Faction: Guerrilla = 1280x720 (2xAA)
Resident Evil 5 = 1280x720 (dynamic 0-4xAA)
Ridge Racer 6 (demo) = 1440x810 (no AA)
Rise of the Argonauts = 1280x720 (2xAA, however post processing is likely interfering with the AA resolve in certain cases )
Rock Band = 1280x720 (2xAA, post-fx or lighting usually resulting in "no AA")
Rock Band 2 = 1280x720 (2xAA, post-fx or lighting usually resulting in "no AA")
Rock Band: The Beatles = 1280x720 (2xAA, post-fx or lighting usually resulting in "no AA")
Rock Band: Green Day = 1280x720 (2xAA, post-fx or lighting usually resulting in "no AA")
Saboteur = 1280x720 (no AA)
Sacred 2: Fallen Angel = 1920x1080 for any HD output (including PC res), 1280x960 for 4:3 output, 1376x768 for 480p widescreen (no AA)
Saint's Row 2 = 640p (2xAA)
SCORE International Baja 1000 = 1280x720 (4xAA)
SEGA: All Stars Racing = 1280x720 (2xAA)
SEGA: Rally Revo = 1280x720 (4xAA, alpha to coverage)
SEGA: Superstars Tennis = 1280x720 (2xAA, 30fps)
Shadowrun = 1280x720 (2xAA) - Gamefest '07
Silent Hill: Homecoming = 1280x720 (2xAA)
Simpsons, The = 1280x720 (no AA)
Singularity = 1280x720 (2xAA)
Skate = 1280x720 (2xAA ? )
Skate 3 = possibly 1152x640 or less (2xAA, super blur filter makes it difficult to determine exact res)
Soldier of Fortune: Payback = 1280x720 (4xAA ?)
Soul Calibur IV = 1365x960 (no AA, software scaled to 720p)
Sonic Unleashed = 880x720 (2xAA)
Spiderman: Web of Shadows = 1280x720 (4xAA)
Splinter Cell: Conviction = 1024X576 (2xAA)
Splinter Cell: Double Agent = 1280x720 (full screen blur, 1-pixel horizontal & vertical)
Split-Second = 1280x672 (2xAA)
Star Ocean 4 = 1248x702 (2xAA + edge blur/DOF, in field), ~936x512 (no AA, in battle)
Star Wars: The Force Unleashed = 1280x720 (no AA)
Stormrise = 1280x720 (4xAA)
Street Fighter IV = 1280x720 (2xAA)
Super Stars V8: Next Challenge = 1280x720 (4xAA)
Super Street Fighter IV = 1280x720 (2xAA)
Tales of Vesperia = 1280x720 (2xAA + full screen blur)
Tekken 6 = 1024x576 w/motion blur, 1365x768 w/o motion blur (no AA)
Terminator: Salvation = 1152x648 (blur filter)
Tiger Woods PGA Tour '09 = 1280x720 (no AA)
Tiger Woods PGA Tour '11 = 1280x720 (no AA)
Tomb Raider: Legend = 1024x600 (2xAA)
Tomb Raider: Underworld = 1024x576 (2xAA) - depth buffer is 1040x576
Tony Hawk's Project 8 (screenshot) = 1040x585 (2xAA)
Tony Hawk's Proving Ground = 1280x720
Top Spin 3 = 1280x720 (2xAA)
Transformers: Revenge of the Fallen = 1120x720 (blur filter)
Transformers: War for Cybertron = 1024x600 (2xAA)
Turning Point: Fall of Liberty = 1280x720 (no AA)
Turok = 1280x720 (no AA)
UEFA Euro 2008 = 1280x720 (2xAA)
UFC 2009: Undisputed = 1280x720 (custom edge AA with 2 colour gradations like 4xAA)
Unreal Tournament III = 1280x720 (2xAA ala Gears...)
Virtua Fighter 5 (demo) = 1024x1024 (4xAA)
Virtua Tennis 3 = 1920x1080 (2xAA)
Virtua Tennis 2009 = 1280x720 (4xAA)
WALL E = 1280x720 (2xAA)
Wanted = 1120x640 (no AA)
Wheelman = 1280x720 (2xAA)
Wolfenstein = 1280x720 (no AA)
X-Men Origins: Wolverine = 1280x720 (2xAA)

XBLA

1942: Joint Strike = 1280x720 (4xAA)
After Burner Climax = 1280x720 (4xAA)
Battlefield 1943 = 1280x720 (no AA)
Bionic Commando: Rearmed = 1280x720 (no AA)
Boogie Bunnies = 1920x1080 (4xAA)
Call of Duty: Classic = 1280x720 (4xAA)
Commando 3 = 1280x720 (4xAA)
Ikaruga = 540x720 (4xAA, centered on 1280x720 frame)
Invincible Tiger = 1280x720 (4xAA, classic mode), 640x720 or 1280x360 (S3D mode), see here for more.
Rez HD = 1280x720 (4xAA)
Serious Sam HD = 1120x630 (blur filter)
Splosion Man = 1280x720 (2xAA)
TMNT: TiT Re-shelled = 1280x720 (no AA)
Trials HD = 1280x680 (no AA, black borders)
Wolf of the Battlefield: Commando 3 = 1280x720 (4xAA)