Good Game, I liked the first one more, but it is still a good stealth game. It is worth $20 for sure, if you have a codebreaker you can get rid of the annoying filters they had to put on the death scenes, although it is playable anyway.
If you didn't like the first Manhunt, don't bother with this one, gameplay is pretty much the same, with the exception of more gunplay in this one.