2. Multi-platform: Watch Dogs
Arguably one of the stand out games at E3 2012, Watch Dogs was a well-kept secret that appeared at the end of Ubisoft's press conference. It features hacker-cum-vigilante assassin Aiden Pearce using his phone to hack phone calls and screw around with various electronics from traffic lights to TV screens.
The blazing firefights, attention to detail and enormity of the setting blew away the LA crowd, not to mention that the game looked absolutely stunning. This was the first any of us had heard or seen of Watch Dogs, which now looks set to be a huge release, potentially sometime next year.
Trailer: Watch Dogs E3 trailer