Zombie Panic! Source is a standalone cooperative, survival-horror, first-person-shooter! Set in the middle of a zombie apocalypse, players start as a small group of survivors attempting to stay alive. Each map will have its own objectives to complete and win the round or survive by a period of time.

Bullet$hoT says

10/10 - Agree Disagree

great mod, and i find interesting that, many people give 1 to this mod because they can't launch it.And people saying that is dead.
Conclusion: Great mod, people should play it, you dont like it? **** off and let other's play.