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