Here is the full list of all 31 Entropy : Zero achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Kill 50 rebels.
Kill 40 rebels.
Evict 20 Vortigaunts from Pillar 10. And from the realm of the living.
Find all of the poem pieces.
Ignite 20 Zombies using flares.
Return the doll.
Sneak through the rebel encampment.
Throw it in a trashcan.
Pick up a can.
Complete the game on Normal mode or higher.
Beat the game on Bad Cop difficulty.
Destroy the Quantinode core.
Die 100 times.
Kill the possessed Hunter.
Experience your first CFLU fever.
Survive the tunnels.
Protect the Stalker in the tunnels.
Find all of the Lambda Generation tags.
Find and wobble 7 Hula dolls.
Get 5 kills using Manhacks only.
Did you hear that?
Survive the grenade encounter.
Find the reference.
Find a prototype AR2.
Survive the betrayal.
Find the dead rebel leader.
Kill 30 rebels.
Kill 20 rebels.
Turn the turrets back on the rebels.
Kill 10 rebels.
Wake up stranded in City 10.