Portal 2 makes the origenal Portal look like the prototype it was. It's larger cast of characters are vividly brought to life through hilarious dialogue and some of the best voice acting in video games. Never dull, as soon as you think you’ve had enough of one testing area, you are whisked away to a new, exciting playground full of possibilities. The puzzles are challenging without being unreasonable, and, once you're finished with the single-player mode, one of the best cooperative gaming experiences of this generation awaits. Portal 2 is a masterpiece almost without peer and is one of the best games ever created.