Here is the full list of all 81 EMPTY SHELL achievements.
Death count: 1
Ammo used: 500
Death count: 10
Leaving Building C
As big as an elephant
Kills count: 50
Ammo used: 2000
Ammo used: 5000
Deploy a Gadget
Upgrades Cost: >1000
Use a Device
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Complete the game on Nightmare difficulty or higher
Complete the game on Hard difficulty or higher
Complete the game on Normal difficulty or higher
Complete the Game on Easy difficulty or higher
Kill the Hand in less than 20 seconds on NIGHTMARE difficulty
Kill 1000 Walking Soulless
Kill 30 Spitting Spiders
Kill 900 Small Spiders
Finish a level without taking any damaged on NIGHTMARE difficulty
Kill 500 enemies with the Old Axe
Finish a level with only melee weapons
Find 5 secret rooms
Kill her with her own weapon
Find 20 secret rooms
Listen to all radio signals till the end
Equip all types of attack drones at the same time
Reach the Construction Site
Pass through the Caves
Pass through the North Wing Building B
Destroy the SSLW System
Reboot the SSLW System
Open 100 supply crates
Open 500 supply crates
Power up both platforms in the Transport Center
Collect all the data disks
Upgrades Cost: >10000
Find the Katana
Kill Miho on Hard difficulty or higher
Kill the Giant Eye on Hard difficulty or higher
Kill the Heart on Hard difficulty or higher
Kill the Brain on Hard difficulty or higher
Kill 100 Armed Soulless
Kill 200 Eyes
Kill 15 Worms or Maggots
Kill 5 Scissors
Use 500 Energy Cells
Complete The Barge without dying on Nightmare difficulty
Fully upgrade the inventory
Find the Ring
Complete the level without wearing the Special Gas Mask
Shock them
Burn them
Nail them
Kills 100 enemies with a precision rifle
Buy the Rocket Launcher
Own 5000+ credits at the same time
Collect 50000+ credits
Upgrade to and fill up 120 of both HP and Armor at the same time
Use 10 different Devices
Use 10 different Gadgets
Reach 40+ mSv of radiation and back without dying
Reach the West Wing
Complete a level with 90+ % of accuracy
Kill Miho without taking damage
Find 10 different melee weapons
Find 20 different ranged weapons
Kills count: 500
Kills count: 2000
Finish a level on Nightmare difficulty using just the hammer
Kill 5 enemies with the Old Axe in less than 1 second
Kill 4 enemies with a single Railgun bullet
Kill a Soulless armed with a rocket launcher with his own rocket
Kill 10 enemies in a row while staying in the front carriage
Cause 10 enemies to end up crushed
Kill 400 enemies with the Machete
Complete the game with no more than 30 volunteers on Hard difficulty or higher
Finish the New Game +