On April 19, gamers were treated with the release of Portal 2, the sequel to a smaller game that could be found in the Orange Box. Portal gained a lot of critical acclaim for its innovative system of using portals to traverse testing areas and also to using them to solve puzzles. Portal 2 brought all of that back, and then improved upon it greatly. By this time, you probably have finished both the single -player and co-op campaigns; however, that doesn't mean that the fun is over. Valve has released the beta software of the authoring tools used to create the puzzles, allowing gamers to come up with their own challenges and share them with the world.