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.
Find all of the poem pieces.
Kill 50 rebels.
Kill 40 rebels.
Complete the game on Normal mode or higher.
Beat the game on Bad Cop difficulty.
Find and wobble 7 Hula dolls.
Get 5 kills using Manhacks only.
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.
Find all of the Lambda Generation tags.
Ignite 20 Zombies using flares.
Find the reference.
Survive the grenade encounter.
Did you hear that?
Find a prototype AR2.
Survive the betrayal.
Find the dead rebel leader.
Return the doll.
Kill 30 rebels.
Turn the turrets back on the rebels.
Sneak through the rebel encampment.
Kill 20 rebels.
Kill 10 rebels.
Wake up stranded in City 10.