E3's Greatest and weirdest moments

Portal 2

The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

The Electronic Entertainment Expo is conference that is known for high points that shake up the gaming world, along with low points that can't be shaken from memory. Not to say all the conferences are triumphant or memorable, but each stood out in their own way. Here are some of our favorite highlights over the years from the big event, and maybe we'll add on a few more after next week.