• Infinite Character Inventory

    Fill your weapon inventory but leave one empty slot. Initiate a Trade with a friend and have them give you two Weapons. Now you can pick up, receive, and hold as many weapons as you want. Be sure to always have at least one more than the maximum number of weapons in your Character Inventory at all times.

    Contributed By: VividAxis.


  • Achievements

    *There are 18 secret achievements. show

    Achiever (secret)Finish all quests in the game100
    At Your ServiceRescue 20 NPCs that have been grabbed by monsters15
    Better than the armKill 25 monsters with a chainsaw30
    BrainLessKill 50 monsters by smashing, decapitating or shooting them in the head15
    Breaching the Tunnels (secret)Successfully defend the tunnel entrance15
    BullyKill 100 monsters with a kick15
    Combat on the roof (secret)Survive the horde on the roof15
    Defeat Harlow (secret)Defeat Harlow15
    Dream TeamComplete all the main quests cooperatively with any number of partners15
    First Do No Harm (secret)Finish hospital quests for Cecil30
    Heart of Darkness (secret)Find a boat for use in the jungle15
    Henderson Town (secret)Reach Henderson15
    Hunter-Seeker (secret)Find and kill all named champion monsters located in dead zones90
    HurlerKill 100 monsters with thrown melee weapons15
    It's an OrderMark 100 opponents which were then killed by your co-op partners15
    JetboatKill 100 monsters using the boat's speed boost90
    JuggernautKill 100 enemies using charge attacks15
    King among Kings (secret)Kill special enemies: Grenadier, Thug, Wrestler, Infected, Suicider, Screamer, Butcher, Floater.30
    Meeting Serpo (secret)Make pact with Serpo15
    Military Base (secret)Gain access to a long-range radio station30
    Mystery solved (secret)Find all the secret files15
    News junkieFind all the volunteer's voice recordings30
    Obtain level 50 (secret)Obtain level 5030
    Obtain level 70Obtain level 7090
    Professional TouristFind all pages from the guide book30
    Serving Science (secret)Finish quests for Dr. Kessler30
    Siege HammerInstall a total of 5 barricades during hub defense15
    The Cinema (secret)Clear out the cinema15
    The CollectorFind 50% of collectibles15
    The Docks (secret)Enter the docks in Quarantine Zone15
    The HoarderFind all collectibles30
    The Hurt Mine LockerKill 10 monsters with one mine15
    The Storm (secret)Escape from the ship15
    TwinsKill the Twins30
    You've tricked me once (secret)Finish the game30

    Contributed By: Guard Master.

Know Something We Don't?

You can submit new cheat codes for this game using our Cheat Submission Form.

Have We Been Fooled?

If you see a non-working or fake code in the list above, let us know by using our Problem Submission Form.