*There are 18 secret achievements. show
Achievement Description Value Achiever (secret) Finish all quests in the game 100 At Your Service Rescue 20 NPCs that have been grabbed by monsters 15 Better than the arm Kill 25 monsters with a chainsaw 30 BrainLess Kill 50 monsters by smashing, decapitating or shooting them in the head 15 Breaching the Tunnels (secret) Successfully defend the tunnel entrance 15 Bully Kill 100 monsters with a kick 15 Combat on the roof (secret) Survive the horde on the roof 15 Defeat Harlow (secret) Defeat Harlow 15 Dream Team Complete all the main quests cooperatively with any number of partners 15 First Do No Harm (secret) Finish hospital quests for Cecil 30 Heart of Darkness (secret) Find a boat for use in the jungle 15 Henderson Town (secret) Reach Henderson 15 Hunter-Seeker (secret) Find and kill all named champion monsters located in dead zones 90 Hurler Kill 100 monsters with thrown melee weapons 15 It's an Order Mark 100 opponents which were then killed by your co-op partners 15 Jetboat Kill 100 monsters using the boat's speed boost 90 Juggernaut Kill 100 enemies using charge attacks 15 King among Kings (secret) Kill special enemies: Grenadier, Thug, Wrestler, Infected, Suicider, Screamer, Butcher, Floater. 30 Meeting Serpo (secret) Make pact with Serpo 15 Military Base (secret) Gain access to a long-range radio station 30 Mystery solved (secret) Find all the secret files 15 News junkie Find all the volunteer's voice recordings 30 Obtain level 50 (secret) Obtain level 50 30 Obtain level 70 Obtain level 70 90 Professional Tourist Find all pages from the guide book 30 Serving Science (secret) Finish quests for Dr. Kessler 30 Siege Hammer Install a total of 5 barricades during hub defense 15 The Cinema (secret) Clear out the cinema 15 The Collector Find 50% of collectibles 15 The Docks (secret) Enter the docks in Quarantine Zone 15 The Hoarder Find all collectibles 30 The Hurt Mine Locker Kill 10 monsters with one mine 15 The Storm (secret) Escape from the ship 15 Twins Kill the Twins 30 You've tricked me once (secret) Finish the game 30
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