Summary: Got the game no problem. I also owned this game before so I know the play style. It is used with steam client engine.. had no issues with product key as well and the game is a good game it just takes a lot of team work to play each round on good servers. I would recommend this game to people who love shooters.
Amazing, I've played this game before and I've never ...
kameron walls, Amazon
5 July 2014
Summary: Amazing, I've played this game before and I've never felt this much more secure and safe because of STEAM anti cheat. Steam really helps me because I can see who I'm playing a game with. Overall , I love this game. Note Killing Floor 2 is coming out now. I will continue the fight.
Summary: The game is pretty cut-and-dry, but what it does: it does well. It's a co-op zombie shooter with good (not great) graphics and interesting currency/leveling mechanics. It's a proven winner for group play sessions and an absolute hit at LAN parties. It's often discounted. If you're a huge fan of DLC, do your research as there's simply a TON of it out there if you want a complete collection.