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