Full list of all 68 Zombie Army Trilogy achievements worth 1,000 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Xbox One.
At least 25 Fire Demons extinguished
Hunted down every last hidden Gold Bar
Performed unlikely yet successful surgery
Investigated a possessed doll and lived to regret it
At least 50 Super Elites bested
Played as every playable character
At least 5000 enemies killed
Killed at least 5 enemies with one sniper bullet
Wiped out the tainted wildlife around the Folterschloss
Army of Darkness completed
Fired shots over 50km in total
The Keep completed
Got a headshot on a Heavy Armour Zombie without removing his helmet first
Committed foul murder
Forest of Corpses completed
Retrieved hot goods from a Chainsaw Elite
At least 25 Summoners silenced
Freight Train of Fear completed
City of Ashes completed
Tower of Hellfire completed
Landed the final blow on at least 20 Super Elites in co-op
Terminal completed
Crucible of Evil completed
Answered a phone call from Hell. It was a wrong number
Revived injured companions at least 50 times
Got at least 20 enemies with one explosion
Purgatory completed
At least 500 Skeletons destroyed
Killed at least 500 enemies with headshots
Achieved an unbroken 10-headshot streak
Helped out companions under direct enemy attack at least 50 times
Subway to Hell completed
Acquired a Panzerfaust
Library of Evil completed
Shot a Suicide Zombie's grenade – that'll teach him
At least 50 Suicide Zombies denied
Labyrinth of Death completed
Showed a Zombie Sniper how it's done – got him in mid-air
Engaged in a 4-player co-op game and beat a Campaign level
Prevented at least 20 enemies from getting up
Over 1,000 limbs lopped
Gateway to Hell completed
Raised your Chain Count to at least 30
Got at least 15 enemies with one explosion
Killed at least 20 enemies while incapacitated
Cathedral of Resurrection completed
Sent an Occult General back to Hell
Village of the Dead completed
Lightened a Super Elite's wallet
Raised your Chain Count to at least 20
Raised your Chain Count to at least 10
Acquired the Preacher
Got at least 10 enemies with one explosion
Put the boot into at least 50 enemies
Successfully complete all Chapters on Sniper Elite difficulty
Put the tortured souls in the Forest out of their misery
Kill 100 Zombie Snipers
Sever 10,000 limbs
Score 5,000 with a single sniper round
Reach at least Wave 10 in Horde Mode – Waves of Despair
Reach at least Wave 10 in Horde Mode – No Sanctuary
Reach at least Wave 10 in Horde Mode – Flood of Tears
Reach at least Wave 10 with the highest score in any Horde Mode map
Reach at least Wave 10 with more gold medals than your companions
Complete every Survivor sidequest
Find and shoot every Bottle of Blood
Reach at least Wave 10 in Horde Mode – Dead End
Reach at least Wave 10 in Horde Mode – Dead Man's Bluff