Aftermath is a hl2 mod which involves the player killing waves of the undead with your friends or alone using weapons, your knife or even blow them up with grenades and set them alight with Molotov's.
I love this game lots, and I'm pretty sure you (The dev) have already thought of this but would you mind switching the fast zombies to the normal slow-ish zombies cuz its pretty hard to get to later waves. Could make the sprint less to compensate or make the character weaker. Also I can't find the pack-a-punch, if its in the game, rotfl.
A very fun mod to play when you just wanna hang out with friends and play something zombie-related. I'm enjoying playing this as much I enjoy reviewing it. I can tell the developers of this mod have really worked hard and are continuing to update it. Cheers to a great zombie mod!
Very well done mod so far. This could be a really big thing with the addition of co-op later. The only thing I felt I truly missed from BO Zombies would have to be the ability to board up spawns but I'm sure that's on the way.