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