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.
Over 10,000 limbs lopped
Helped out companions under direct enemy attack at least 50 times
At least 50 Super Elites bested
At least 100 Zombie Snipers taken out
Army of Darkness completed
The Keep completed
At least 25 Summoners silenced
Forest of Corpses completed
At least 500 Skeletons destroyed
Retrieved hot goods from a Chainsaw Elite
Showed a Zombie Sniper how it's done – got him in mid-air
Freight Train of Fear completed
Committed foul murder
Killed at least 5 enemies with one sniper bullet
At least 5000 enemies killed
City of Ashes completed
Tower of Hellfire completed
Terminal completed
Crucible of Evil completed
Gateway to Hell completed
Purgatory completed
Subway to Hell completed
Fired shots over 50km in total
Raised your Chain Count to at least 30
Prevented at least 20 enemies from getting up
Answered a phone call from Hell. It was a wrong number
Library of Evil completed
At least 50 Suicide Zombies denied
Labyrinth of Death completed
Shot a Suicide Zombie's grenade – that'll teach him
Got at least 15 enemies with one explosion
Got at least 10 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
Over 1,000 limbs lopped
Acquired a Panzerfaust
Killed at least 500 enemies with headshots
Lightened a Super Elite's wallet
Achieved an unbroken 10-headshot streak
Put the boot into at least 50 enemies
Reached at least Wave 10 in Horde Mode and had the highest score by the end
Reached at least Wave 10 in Horde Mode and had the most gold medals at the end
Reached Wave 10 in Horde Mode – Dead End
Got a headshot on a Heavy Armour Zombie without removing his helmet first
Acquired the Preacher
Raised your Chain Count to at least 20
Raised your Chain Count to at least 10
Successfully complete all Chapters on Sniper Elite difficulty
Become possessed
Save the man in the hospital
Put the tortured souls in the Forest out of their misery
Shoot the 3 Zombie Ravens outside the Folterschloss
Complete any Campaign chapter in 4-player co-op at any difficulty level
Kill 25 Fire Demons
Get at least 20 for 1 with an explosive kill
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
Revive other players 50 times
Kill 20 Elites in co-op
Complete every Survivor sidequest
Complete levels as every playable character
Collect every Gold Bar
Find and shoot every Bottle of Blood
Reach at least Wave 10 in Horde Mode – Dead Man's Bluff