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.
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Find the reference.
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.
Get 5 kills using Manhacks only.
Wake up stranded in City 10.
Find and wobble 7 Hula dolls.
Find all of the poem pieces.
Find all of the Lambda Generation tags.
Pick up a can.
Throw it in a trashcan.
Survive the grenade encounter.
Protect the Stalker in the tunnels.
Survive the tunnels.
Experience your first CFLU fever.
Kill the possessed Hunter.
Destroy the Quantinode core.
Kill 40 rebels.
Kill 50 rebels.
Ignite 20 Zombies using flares.
Evict 20 Vortigaunts from Pillar 10. And from the realm of the living.
Die 100 times.
Complete the game on Normal mode or higher.
Beat the game on Bad Cop difficulty.