Map is a pain solo.. I tried recording a video but couldn't get a decent play through lol.. Must try harder
Hehe, the trick is to keep the zombies back while you:
-open the map to get to tiered weapons.
-upgrade(keep track of point limit).
-unlock secret doors(shoot small artillery hidden in the map).
Then let the zombie further in the map to open next soul door when you feel confident.
Do you think you could update it one more time to fix Quick Revive? I hate having all the zombies round up on top of me and dying as soon as I get back up
Will try to do that if I got time and figure out how to do it.
Meanwhile, crawl away from where you got downed(you can crawl when downed) so you're not surrounded when you get back up. This works about 90%+ of the time for me.
Hope that helps for now