Here small list of the games announced in E3 2012:

Xbox 360 (Exclusively):

• Gears of war: Judgment
• Forza Motorsport: Horizon
• Halo: 4
• Fable: The journey

PS3 (Exclusively):

• God of war: Ascension

Wii U (Exclusively):

• New super mario bros. U
• Wii U fit

Cross Platforms:

• Call of Duty: Black ops 2
• Dead Space 3
• Metal Gear Rising: Revengeance
• Far Cry 3
• Grand Theft Auto V
• Resident Evil 6
• Tomb Raider