" Extensive single player Featuring next generation gameplay and a wildly-engrossing storybr Complete two-person co-op Multiplayer game featuring its own dedicated story characters and gameplaybr Advanced physics Allows for the creation of a whole new range of interesting challenges producing a much larger but not harder gamebr Massive sequel The original Portal was named 2007s Game of the Year by over 30 publications worldwidebr The single-player portion of Portal 2 introduces a cast of dynamic new characters a host of fresh puzzle elementsbr A much larger set of devious test chambers br Portal 2 - PC"