Successfully complete 72 hours in the mall and return to the helipad before 12:00 am on the 22nd to unlock the Overtime mode.
Successfully complete the game with the “true” ending to unlock unlimited mode.
Go up to the second floor, then go to the Columbian Roastmasters. Go to where the ATM is located, then jump onto the roof / ledge below. Land on the orange overhang, then find the katana.
Jump off the stairs closest to you when you start on the blue ledge above Kid’s Choice Clothing. Follow the catwalk past the teddy bear to the end to find the submachine gun.
At the Food Court, head to the poster with the Italian chef. Climb up to its left side, then to the top to find an Uzi.
Servbot Head Realignment Bonus
At the toy store, hit the giant servbot until the swirling eyes are lined up with the sad face by 10,000 pp.
Successfully complete one of the following tasks to unlock the corresponding item inside a shopping bag behind the air duct in the Security Room:
Ammo Belt – Don’t get lost with a machine gun.
Arthur’s Boxers – Survive for at least 7 days.
Hockey Mask: Photograph all the PP stickers.
Lightsaber – Survive for at least 5 days.
Mall Clerk Uniform: Answer all calls from Otis.
Mega Man Boots: Get the true ending without getting knocked out.
Mega Man Stockings: Defeat at least 10 psychopaths.
Prisoner Outfit: Steal the convict’s vehicle.
Pro Fighting Boots: Break at least 100 items.
Pro Wrestling Briefs: Defeat at least 1000 zombies with your bare hands.
Real Mega Buster: Defeat at least 53,594 zombies.
Special Forces Boots: Defeat at least 15 psychopaths.
Special Forces Uniform: Repel a helicopter.
White hat: photograph at least 50 survivors.
Unknown: Take at least 50 survivors out of the mall.