What an awesome game, even better than the original Portal. No real replay value, though, unless you consider the fan-made maps you can download, although unfortunately the gamedoesn't have a built-in way to do this; you need to do it all manually.

That aside, though, Portal 2 is superb. The story, the acting, and most importantly the puzzles, are all there and executed brilliantly. And since it's a Valve game, it's probably going to be on sale quite regularly, so try to grab it in a sale - it's well worth it. :D

This is a good game, but it's not safe to play if you have issues with flashing colours! There's at least one area where this is a big problem. :(