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gm_blackmesa_sigma zombie survival

Black Mesa, has been taken over by zombies! I spent 30 mins making this, there are some ailen friends that will help you out in the Xen, there are 3 airboats to get to other places, this may lag, I am sorry if it does, anyway please remember to like, and I could make more of these! (Note: When I loaded this up, the ailens friends were gone, if the zombies get stuck in the ground pull them up, and put them on the ground with your Phyiscs Gun, the humans will be standing werid because I killed them before I saved this save, if there is any bugs, report to me and I'll fix it.)