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