Key:
♦ = Xbox 360
♦ = PS3
♦ = Wii
♦ = PC
♦ = DS
♦ = PSP
♦ = PS2
June 2009:

• Mario vs. Donkey Kong: Minis March Again (DSi) – 6/8/09♦
• EA Sports Grand Slam Tennis (Wii version) – 6/8/09 ♦
• PROTOTYPE – 6/9/09 ♦ ♦ ♦
• Tiger Woods PGA Tour 10 – 6/10/09 ♦ ♦ ♦♦ ♦
• Transformers: Revenge of the Fallen – 6/15/09 ♦ ♦ ♦♦ ♦ ♦ ♦
• The Conduit – 6/23/09 ♦
  
• Monster Hunter Freedom Unite – 6/23/09 (already out in Japan) ♦
• Shin Megami Tensei: Devil Survivor – 6/23/09 (already out in Japan) ♦
• Fight Night Round 4 – 6/25/09 ♦ ♦
• Dynasty Warriors: Empires – 6/26/09 (already out in Japan) ♦ ♦
• Flower, Sun, and Rain: Unending Paradise (already out in Japan) ♦
• BlazBlue – 6/30/09 (25th in Japan) ♦ ♦
• Call of Juarez: Bound in Blood – 6/30/09 ♦ ♦♦

July 2009:

• Hannah Montana PSP bundle ♦
• Battlefield 1943: Pacific – 7/1/09 ♦ ♦
• East India Company – 7/2/09 ♦
• Tales of Monkey Island – 7/7/09 ♦ ♦
• Street Fighter IV (For PC) – 7/7/09 ♦
• The Bigs 2 – 7/7/09 ♦ ♦ ♦ ♦ ♦
• NCAA Football 10 – 7/14/09 ♦ ♦♦ ♦
• King of Fighters XII – 7/16/09 ♦ ♦
• Unbound Saga – 7/16/09 ♦
• The King of Fighters XII – 7/16/09 (already out in Japan) ♦ ♦
• Little King’s Story – 7/21/09 ♦
• Wii Sports Resort – 7/26/09 ♦

August 2009:

• Afrika ♦
• Wolfenstein – 8/4/09 ♦ ♦ ♦
• Hearts of Iron III – 8/4/09 ♦
• Madden NFL 10 – 8/14/09 ♦ ♦ ♦♦ ♦
• Professor Layton and the Diabolical Box – 8/24/09 ♦
• Batman: Arkham Asylum – 8/25/09 ♦ ♦ ♦
• Darkest of Days – 8/25/09 ♦♦
• Dissidia: Final Fantasy – 8/27/09 ♦
• Harvest Moon: Sunshine Island – 8/31/09 (already out in Japan) ♦

September 2009:

• Shin Megami Tensei: Persona ♦
• Battlefield 1943: Pacific (PC) ♦
• Muramasa: The Demon Blade ♦
• Nostalgia ♦
• Harvest Moon: Animal Parade (already out in Japan) ♦
• Pokemon Mystery Dungeon: Explorers of the Sky (already out in Japan) ♦
• Mini Ninjas ♦ ♦ ♦ ♦ ♦
• Guitar Hero 5 – 9/1/09 ♦ ♦ ♦♦
• NHL 10 – 9/8/09 ♦ ♦
• Beatles Rockband – 9/9/09 ♦ ♦ ♦
• Abby Road DLC (”shortly after” Beatles Rockband launch, so mid/late 9/09) ♦ ♦
• Halo 3: ODST – 9/22/09 ♦
• Need for Speed: Shift – 9/22/09 ♦ ♦ ♦ ♦
• Kingdom Hearts: 358/2 Days – 9/29/09 ♦
• Dead Space: Extraction – 9/29/09 ♦
• Borderlands – 9/30/09 ♦ ♦♦
• Operation Flashpoint: Dragon Rising – 9/30/09 ♦ ♦♦
• Silent Hill: Shattered Memories – 9/30/09 ♦ ♦ ♦
• Section 8 – 9/30/09 ♦ ♦
• Soulcalibur: Broken Destiny – 9/30/09 ♦
• Scribblenauts – 9/30/09 ♦

October 2009:

• Alpha Protocol ♦ ♦ ♦
• Mario & Sonic at the Olympic Winter Games ♦ ♦
• PSP Go! (NA and Europe) – 10/1/09 ♦
• Gran Turismo PSP – 10/1/09 ♦
• Brutal Legend – 10/13/09 ♦ ♦
• Women’s Murder Club: Games of Passion – 10/13/09 ♦
• Dragon Age: Origins – 10/20/09 ♦ ♦ ♦
• Saw – 10/23/09 ♦ ♦ ♦
• Pro Evolution Soccer 2010 – 10/23/09 ♦ ♦ ♦ ♦ ♦
• Rabbids Go Home – 10/27/09 ♦
• Tekken 6 – 10/27/09 ♦ ♦♦
• Forza Motorsports 3 – 10/27/09 ♦
• FIFA Soccer 10 – 10/30/09 ♦ ♦ ♦ ♦ ♦ ♦ ♦
• Bioshock 2 – 10/30/09 ♦ ♦ ♦
• DJ Hero – 10/31/09 ♦ ♦ ♦♦

November 2009:

• Uncharted 2 ♦
• PSP Go! (Japan) – 11/1/09 ♦
• Modern Warfare 2 – 11/10/09 ♦ ♦ ♦
• Red Steel 2 – 11/10/09♦
• Assassin’s Creed: Bloodlines – 11/10/09 ♦
• Left 4 Dead 2 – 11/17/09 ♦♦
• Assassin’s Creed 2 – 11/17/09 ♦ ♦ ♦ ♦ ♦

Other/Unspecified 2009:

• DC Universe Online ♦ ♦
• Divinity 2 ♦♦
• The Lord of the Rings: Aragorn’s Quest ♦ ♦ ♦♦
• Tony Hawk Ride ♦ ♦ ♦
• Spyborgs ♦
• Blur ♦ ♦ ♦
• Painkiller ♦
• Order of War ♦
• Arc Rise Fantasia (already out in Japan) ♦
• Zephyr: Rise of the Elements ♦ ♦ ♦
• Yoga Wii ♦
• Droplitz ♦ ♦ ♦
• Neo Steam: The Shattered Continent ♦
• PixelJunk Shooter♦
• Venetica ♦♦
• Bayonetta ♦ ♦
• Golden Sun DS ♦
• Mushroom Wars ♦
• last.fm on Xbox Live ♦
• Shadow Complex – summer ♦
• Flip Notes Studio – summer ♦
• Upload of DSi Photos to Facebook – summer ♦
• Valhalla Knights: Eldar Saga – summer♦
• Splinter Cell: Conviction – fall ♦♦
• Grand Theft Auto: The Ballad of Gay Tony ♦
• Marvel Ultimate Alliance 2 – fall ♦ ♦♦ ♦ ♦ ♦
• Sky on Xbox Live – fall ♦
• Twitter and Facebook on Xbox Live – fall ♦
• Littlest Pet Shop Online – fall ♦
• PixelJunk Shooter – fall ♦
• Tiger Woods PGA Tour Online – fall ♦
• Free Realms PS3 – fall ♦
• Jak and Daxter: The Lost Frontier – fall ♦ ♦
• A Boy and His Blob – fall ♦
• Singularity – fall ♦ ♦♦
• Toy Story Mania – fall ♦
• Spectobes: Origins – fall ♦
• The Aftermath – fall ♦
• Mario & Luigi: Bowser’s Inside Story – fall ♦
• Wii Fit Plus – fall ♦
• EA Sports Grand Slam Tennis (PS3/360 versions) – fall ♦ ♦
• Katamari Forever – fall ♦
• MAG – fall ♦
• Sense Me on PSP – fall♦
• LittleBigPlanet’s Disney DLC – fall ♦
• Perfect World – fall (already out in some countries)♦
• Majesty 2 – fall ♦
• Robocalypse: Beaver Defense – fall ♦
• EA Sports Active Expansion Pack – this holiday season ♦
• The Saboteur – this holiday season ♦ ♦♦
• Fairytale Fights – this holiday season ♦ ♦ ♦
• Army of Two: The 40th Day – this holiday season ♦ ♦ ♦
• LEGO Rock Band – this holiday season ♦ ♦ ♦ ♦
• White Knight Chronicles – this holiday season (possibly 2010, sources conflict) ♦
• Ratchet & Clank Future: A Crack in Time – this holiday season♦
• New Super Mario Bros. (Wii) – this holiday season ♦
• Avatar – this holiday season (platforms TBA)
• Legend of Zelda: Spirit Tracks – this holiday season♦
• Ubisoft’s U Play on launch titles – “end of the year”
• Ragnarok Online DS – winter (or 2010) (already out in Japan)♦
• Tatsunoko vs. Capcom: Ultimate All Stars – winter (or 2010) (already out in Japan) ♦
• MotorStorm: Arctic Edge – winter (or 2010) ♦ ♦
• Torchlight – winter (or 2010) ♦
• SOCOM: U.S. Navy SEALs Fireteam Bravo 3 – winter (or 2010) ♦
• Shaun White Snowboarding: World Stage – winter (or 2010) ♦
• Castlevania: Lord of Shadow – winter (or 2010) ♦ ♦
• Resident Evil: The Darkside Chronicles – winter (or 2010) ♦
• Dragonica Online – winter (or 2010)♦
• Dead to Rights: Retribution – winter (or 2010) ♦ ♦
• Ave Attorney Investigations: Miles Edgeworth – winter (or 2010) (already out in Japan) ♦

2010 (and beyond):

• Darksiders – 1/2/10 ♦ ♦
• Dante’s Inferno – January ♦ ♦ ♦
• No More Heroes: Desperate Struggle – January ♦
• Battlefield: Bad Company 2 – Q1 2010 ♦ ♦ ♦
• Aliens vs. Predator – Q1 2010 ♦ ♦ ♦
• APB – Q1 2010 ♦♦
• Sin and Punishment 2 – Q1 2010 ♦
• Heavy Rain – Q1 or 2010 (some places have it listed as late 09) ♦
• Mass Effect 2 – early 2010 ♦♦
• Lost Planet 2 – early 2010 ♦ ♦ ♦
• Mafia II – early 2010 ♦ ♦ ♦
• Split/Second – March 2010 ♦ ♦ ♦
• God of War III – March 2010 ♦
• Taikodom – March 2010 ♦
• Ps3’s motion controllers – spring ♦
• Final Fantasy XIII – spring ♦ ♦
• Alan Wake – spring ♦ ♦
• Halo: Reach – fall (beta available with purchase of ODST) ♦
• EA Sports: MMA (platforms TBA)
• Metroid: The Other M♦
• Super Mario Galaxy 2 ♦
• Supreme Commander 2 ♦ ♦
• The Grinder ♦
• Sonic and Sega All-Stars Racing ♦ ♦ ♦ ♦ ♦
• Metal Gear Solid Rising ♦♦ ♦
• Metal Gear Solid Peace Walker ♦
• Final Fantasy XIV (Online) ♦ ♦
• ModNation Racers ♦
• The Agency ♦ ♦
• Crackdown 2 ♦
• Front Mission Evolved ♦ ♦ ♦
• Nier ♦ ♦
• Dead Rising 2 ♦ ♦ ♦
• Crysis 2 ♦ ♦ ♦
• Heroes of Telara (platforms TBA)
• Resident Evil Portable ♦
• Trauma Team ♦
• The Last Guardian ♦

Source:
E3 2009: Comprehensive List of Release Dates