Off Topic > Games
Zombie! Panic (HL2 mod)
Thirsty:
There are class mods for this by the way. Also, the mod is flawed a little bit at times, but I still love it. It is a bit annoying when, somebody decides to run off with all the ammo and die because they are weighed down by the extra stuff they don't need. Overall, it's good and it's free.