Defeating the stone golems:
Shoot the pieces of stone that are glowing. After you have shot all of the pieces, keep grenading him with the secondary fire of your gun that you have.

Defeating Beating Gigi's brother (first form):
Wait until he shoots a missile at you. Then, get out of you body and possess the missile. Aim the missile toward him. Do this quickly, as the red ghosts will possess you and try to make you kill yourself.

Escaping from ghosts:
This trick requires a controller with an auto-fire feature. Set the auto-fire to a button. Every time you get caught by them, just hold a button. This helps when fighting the Boss that takes over Rouqe's body.

Prototype weapons:
At the part were you scare the three scientists, the one you possess determines which weapon you will get. To get one of them, have a host knock on the door.

Base: Rocket launcher:
To get the rocket launcher on the multi-player map "Base", jump boost to get on the skinny platform where a man is standing. Go left from the gun turret to get there.

Metroid reference:
Look in one of the lockers in the girl's shower room to find Samus' helmet.

Hidden Gamecube:
Look in one of the lockers in the girl's shower room to find a Gamecube.

Weird dialogue:
Talk to the guard that took you to get Rouqe's armor. Once you get the armor he will say nothing for a short while, then say "What am I doing here?"

Multi-player bonuses:
Collect the following number of Host Collectibles during single player mode to unlock the corresponding multi-player bonus.

Office level: 2
Storage level: 4
Raimi and Rabbit characters: 6
Medical level: 8
Towel Girl and Bat characters: 10
Helipad level: 12
Chef and Rat characters: 14
Raid level: 16
Dead Garden level: 18
Summit level: 20
Volks and Roach characters: 22
Complex level: 24
Heaven level: 26
Boss level: 28
Anna and Imp characters: 30
Catacombs level: 32

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