The Mansion level is set in a cursed mansion where a murderer's remains are causing zombies and mutants to run amok. It is widely considered to be the hardest mission in the original game, particularly on the higher difficulty settings. Set in 1965, you control either Peekaboo Jones or Mary-Beth Casey. This is the only level where the arsenal is limited to one other weapon aside from the fists.
Players should note that as in other undead levels, zombies can wield weapons, although they will drop them on the first knockdown and use their fists if the player did not kill them the first time.
Mansion Easy World Record - 29.9 seconds by Ace, Silent Thunder and Butternutsquash
HARD When you first start out their will be 8 green/brown zombies shoot the ones the are first then the ones in the back if you did it right the next set of zombies would appear kill them then get the ammo if you have not done so if you missed no shots you will have 2/86 shot gun shells . Then go through the door kill the zombies then duck down and kill the overall mutant it might take 2 usual 1 then do not go all the way through shoot the next overall mutant face left in the hallway wait after a grenade then run out and shoot the next overall mutant in the corner then shoot the one who is throwing the bombs behind the stairs but do not go through the door all the way then the zombies then go through then kill the remaining one after that shoot the overall mutant go forward but not in front of the door shoot the other overall mutants if you missed one wait if you lost to much health restart then kill the priest mutant then kill the brown zombie that appears then kill the next priest mutant then kill the brown/green zombie . Then go back in the hallway kill the girl zombie that appears kill the next priest mutant shoot the police zombie if you did it fast enough you 75% you will get his head off without aiming then kill the next two zombies that appear then the next set at the stairs duck down and kill the priest mutant at the top of the stairs go to the top of the stairs and kill the overall mutant run back down and wait for the police zombies shoot them so they lose their shotguns enter the room and shoot the police zombie that appears shoot the deer turret. Go in the room where the police zombie appeared and do not go all the way through shoot the zombies that appear run in the hall way but behind the stairs shoot the priest mutant fast then the jacket zombie. Shoot the jacket zombies at the top of the stairs go up the stairs and shoot the jacket zombie in the hallway then the one in the room shoot the deer turrets then the polices zombies shoot the brown/green zombie then shoot the police zombie that you first see then the one in the corner then duck and shoot the jacket zombie that is on top of the stairs go if forward then shoot the police zombie who is by the steps then kill the two girl zombies who are on the floor then duck down just the enough to see the police zombie that is on the stairs shoot him then kill the remaining zombie shoot the overall mutant then go in the room before the go to the end but not enough that the mutants can see you go back and keep facing the same way and kill the police zombie.Shoot the green/brown zombie then run into the room that he was in wait for the police zombie to come shoot him then stay in the room shoot the priest mutant if the police zombie saw you wait for him then shoot the other priest mutant but stay behind the stairs then shoot thee jacket zombie just enough where you can shoot him but he can not see you then run past the stairs so the other one sees you wait for him then kill the remaining police zombies.