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.
Reached Wave 10 in Horde Mode – Dead End
Over 10,000 limbs lopped
Hunted down every last hidden Gold Bar
Spotted and destroyed every Bottle of Blood
Played as every playable character
All Chapters completed on Sniper Elite difficulty
At least 25 Summoners silenced
At least 50 Super Elites bested
Retrieved hot goods from a Chainsaw Elite
Wiped out the tainted wildlife around the Folterschloss
Performed unlikely yet successful surgery
Put the tortured souls in the Forest out of their misery
At least 100 Zombie Snipers taken out
At least 5000 enemies killed
Killed at least 5 enemies with one sniper bullet
Army of Darkness completed
The Keep completed
Forest of Corpses completed
Sent an Occult General back to Hell
Crucible of Evil completed
Answered a phone call from Hell. It was a wrong number
Helped out companions under direct enemy attack at least 50 times
Freight Train of Fear completed
City of Ashes completed
Acquired a Panzerfaust
Investigated a possessed doll and lived to regret it
Committed foul murder
Tower of Hellfire completed
Revived injured companions at least 50 times
Gateway to Hell completed
Engaged in a 4-player co-op game and beat a Campaign level
Purgatory completed
Subway to Hell completed
At least 500 Skeletons destroyed
Fired shots over 50km in total
Landed the final blow on at least 20 Super Elites in co-op
Library of Evil completed
Lightened a Super Elite's wallet
Labyrinth of Death completed
At least 50 Suicide Zombies denied
Got a headshot on a Heavy Armour Zombie without removing his helmet first
Got a score of 5,000 with a single sniper round
Raised your Chain Count to at least 30
Achieved an unbroken 10-headshot streak
Showed a Zombie Sniper how it's done – got him in mid-air
Prevented at least 20 enemies from getting up
Killed at least 500 enemies with headshots
Over 1,000 limbs lopped
Killed at least 20 enemies while incapacitated
Acquired the Preacher
Got at least 20 enemies with one explosion
Got at least 15 enemies with one explosion
Got at least 10 enemies with one explosion
Cathedral of Resurrection completed
Raised your Chain Count to at least 20
Village of the Dead completed
Shot a Suicide Zombie's grenade – that'll teach him
Terminal completed
Put the boot into at least 50 enemies
Raised your Chain Count to at least 10
Kill 25 Fire Demons
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
Reach at least Wave 10 in Horde Mode – Dead Man's Bluff