I'd probably rent it rather than buy it. It's a fairly short game with no real replay value. You could always pay more money for the DLC but it doesn't add any real value to the game IMO.
i have this game, shits sweet if you are a mutli-junkie. I think it has huge replay value, considering it makes you do QUESTS. Also it has a 2nd play through option for once you beat the game, therefore adding another reason to replay. I have the zombie island and the under dome arena add on and its fun as well. Good if you are into the fps rpg stuff.
Sure you can play through it multiple times but nothing changes other than the difficulty of the enemies. The DLC imo was not worth the $10 a piece you had to pay for it.
I'm not shitting on the game friends. I played through it a few times and enjoyed it but it isn't worth paying full price for.