This is a top quality valve game. The singleplayer is lengthy, atmospheric, and tons of fun, though perhaps a bit too easy. The coop is nice and hard, with a background story tying it together. There is also a powerful map editor, with the ability to play maps made by other people. Any of those three things would make this game worthy of recommendation. If you are a fan of humor, sci-fi, or brain-bending puzzles, this is for you.

This is a top quality valve game. The singleplayer is lengthy, atmospheric, and tons of fun, though perhaps a bit too easy. The coop is nice and hard, with a background story tying it together. There is also a powerful map editor, with the ability to play maps made by other people. Any of those three things would make this game worthy of recommendation. If you are a fan of humor, sci-fi, or brain-bending puzzles, this is for you.