I loved the original Portal game and the sequel is just as good, but is now a full length game. The plot carries on from the original. The same excellent voice-acting and humour are there along with some backstory. It’s great to play a game that doesn’t simply rely on blasting things, unlike almost every other game on Xbox.
Portal 2 also adds an online or split screen multiplayer mode. I’ve only played the first few levels of this so far, but it’s good stuff. Just need to find someone to play online with. :-)