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.
Find all of the Lambda Generation tags.
Kill 50 rebels.
Kill 40 rebels.
Ignite 20 Zombies using flares.
Find the reference.
Return the doll.
Kill 30 rebels.
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.
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.
Find and wobble 7 Hula dolls.
Did you hear that?
Survive the grenade encounter.
Find a prototype AR2.
Survive the betrayal.
Find the dead rebel leader.
Kill 20 rebels.
Turn the turrets back on the rebels.
Sneak through the rebel encampment.
Kill 10 rebels.
Wake up stranded in City 10.
Die 100 times.
Get 5 kills using Manhacks only.