This is a really short game. That being said, there are a lot of choices, and you will be replaying it about 4 or 5 times. This is a mod For Half Life 2, but you DO NOT NEED HALF LIFE 2 TO PLAY IT! All you need is Steam. Google it, and it should be the first result. Download that blam!, and play it till you're bored. It breaks the fourth wall of gaming. On top of that, it's really addicting.

If you've tried it, discuss it. If you haven't PLAY IT! It's better than the last 3 Call of Duty games combined.