It's not working for me either. just a black screen. seens like from the comments its not even worth it. premium content for games like this make me laugh. this isnt call of duty or anything close to being worth paying for.
when selling your upgrades it never tells you what percentage of it you get back. and that really screwed me over when i thought naively that id get 100% of it back. and i got like maybe 10/20% of it back money f'd myself so now i cant get any decent upgrade.
one glitch is on the third level on survivor if you put a concrete block on the very right entrance the zombies dont even spawn and therefor you cant beat the level because it says they're still alive and you cant even get to them.
WHY DOES IT ALWAYS DO THAT WHEN I WIN OR QUIT MID GAME , IT GOES TO THE MENU AND JUST STARTS SPAMMING A TON OF NOISE OF CONCRETE BUBBLES GETTING HIT AND WTF SJLDKJASLD8
You gotta pay the troll toll to get in! https://www.youtube.com/watch?v=h2UpQ3Us7F0