If you like puzzle games, this is about as good as it gets. There is no other puzzle game like this, and believe me when I say you won't be disappointed. The first Portal game was just an extra; this is a full-length game. The first thing you'll notice is the inclusion of co-op which adds an entirely new layer of fun to the game. Think about what you could do with 2 portals, and imagine how you would complicate the puzzles with 4 portals instead. It's challenging and fun at the same time.