It's Roblox Apocalypse Tycoon. And the mission is to build up my tycoon so that I can get lots of weapons to kill as many zombies as possible. I am the last line in the defense of whatever is beyond the dark tunnel that I can't see thru, nor am I allowed to enter. Only zombies can enter into the hole. But I am not allowed. So I must stop the zombies from entering out of pure jealousy. That's literally the only reason I agreed to this mission anyway