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 headshot on a Heavy Armour Zombie without removing his helmet first
Forest of Corpses completed
Retrieved hot goods from a Chainsaw Elite
Put the tortured souls in the Forest out of their misery
At least 100 Zombie Snipers taken out
Freight Train of Fear completed
At least 25 Fire Demons extinguished
At least 25 Summoners silenced
Got at least 20 enemies with one explosion
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
Terminal completed
Killed at least 5 enemies with one sniper bullet
Fired shots over 50km in total
Prevented at least 20 enemies from getting up
Played as every playable character
Crucible of Evil completed
Answered a phone call from Hell. It was a wrong number
Got at least 15 enemies with one explosion
At least 500 Skeletons destroyed
Gateway to Hell completed
Purgatory completed
Subway to Hell completed
At least 50 Suicide Zombies denied
Library of Evil completed
Over 1,000 limbs lopped
Labyrinth of Death completed
Lightened a Super Elite's wallet
Killed at least 500 enemies with headshots
Cathedral of Resurrection completed
Sent an Occult General back to Hell
Showed a Zombie Sniper how it's done – got him in mid-air
Raised your Chain Count to at least 30
Achieved an unbroken 10-headshot streak
Shot a Suicide Zombie's grenade – that'll teach him
Village of the Dead completed
Acquired the Preacher
Put the boot into at least 50 enemies
Got at least 10 enemies with one explosion
Acquired a Panzerfaust
Raised your Chain Count to at least 20
Raised your Chain Count to at least 10
Successfully complete The Keep
Successfully complete Army of Darkness
Successfully complete all Chapters on Sniper Elite difficulty
Shoot the 3 Zombie Ravens outside the Folterschloss
Complete any Campaign chapter in 4-player co-op at any difficulty level
Kill 5000 enemies of any kind
Kill 50 Super Elites
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
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
Complete every Survivor sidequest
Collect every Gold Bar
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