Zombie Panic! Source/Biotec

This is really a fun level. There isn't a definite strategy, seeing as all players tactics as zombies are different. I will put two sections in this walkthrough for simplicity.

Humans: Above all, as is with all levels, STAY TOGETHER. You do zero good to your team if all you are doing is wandering through the hallways of Biotec before quickly being ambushed by zombies that have been stalking you. Instead, work in a close knit group. move toward your objectives slowly but surely. If someone is infected, do your team a favor and dispose of him. You don't want him becoming a zombie and killing your entire team in one strike. Another thing. BRING BETTER GUNS. Sitting there with frying pans and G17s you will not last for long. But if you bring a few shotguns, your chances are pretty big of surviving.

Zombies: Although it can be fun to just rush the humans head on, it works so much better to do something like in the lobby, crouch on one of the balconies and watch the survivors pass by. If you are lucky they won't notice you and you can jump behind them and end the round in one quick strike. Try hiding around the corners in hallways and waiting until they turn the corner and maul them. this works VERY well if you have a bunch of guys with you in the case that someone is hanging right behind the group in case that happens. Another thing is to use team chat to plan. My favorite thing to do is to get a bunch of guys to get organized enough to find a good point, such as the basement with the switch, to just flat out RUSH. Charge and hope for the best. If you do it right you can wipe every one of them right then and there.