Multiplayer Features
For every two Host Collectibles that you find in the single player game, you will unlock an extra feature for the multiplayer mode in the order shown below.

    * Office Multiplayer Level
    * Storage Multiplayer Level
    * Raimi and Rabbit Characters
    * Medical Multiplayer Level
    * Towel Girl and Bat Characters
    * Helipad Multiplayer Level
    * Chef and Rat Characters
    * Raid Multiplayer Level
    * Dead Garden Multiplayer Level
    * Summit Multiplayer Level
    * Volks and Roach Characters
    * Complex Multiplayer Level
    * Heaven Multiplayer Level
    * Boss Multiplayer Level
    * Anna and Imp Characters
    * Catacombs Level