Complete the 'Research Facility' map
Whisper Mountain Outbreak
Rising Hell Steam key (Worldwide)
×1
Knock down 50 zombies (in-game achievement)
Whisper Mountain Outbreak
Whisper Mountain Outbreak Steam key (Worldwide)
×1
Achieve 200 ducks combo
Project P.I.T.T.
Project P.I.T.T. Steam key (Worldwide)
×1
Find and place all the fuses
Project P.I.T.T.
Project P.I.T.T. Steam key (Worldwide)
×1
Defeat The Jailer, The Merchant, The Savage Beast, & The Matriarch in a single run.
Hell Clock
Conquest Dark Steam key (Worldwide)
×1
Defeat The Merchant and The Savage Beast.
Hell Clock
Cursemark Steam key (Worldwide)
×1
Buy five items from the non-upgrades tab in the shop
Scale the Depths
Scale the Depths Steam key (Worldwide)
×1
Save your teammate from the hornet
John Carpenter's Toxic Commando
Warstride Challenges Steam key (Worldwide)
×1