The 2011 version of the Electronic Entertainment Expo is in the books.

Nintendo introduced the Wii U. Sony apologized for the PSN hacking disaster and introduced its new portable gaming system, the Vita. Microsoft announced live TV was coming to Xbox 360. Countless software companies previewed their latest games. All told, it was a memorable event, one that most video game fans are not likely to soon forget.

Here is a look back at the event.