Here is the full list of all 46 SKYHILL achievements.
Get secret ending
Complete the game on Hardcore
Explore every room in one playthrough
Barter something with the old man
Dodge three hits in a row
Use Mysterious Device perk
Print the document
One-shot the parasite
Score a critical hit for 60+ damage
Upgrade your Workbench to max level
Upgrade your Door to max level
Upgrade your Bed to max level
Kill 10 enemies in the row with a mop
Kill an enemy with your bare hands
Complete the game
Fix all panels during one playthrough
Get food-poisoning
Use Lucky Bastard perk
Chat with the computer
Use Deductive Method perk
Release the hangman
Upgrade your Kitchen to max level and cook something
Win a battle with 5 or less health
Use Amnesia perk
Craft three medium medkits
Follow the legend
Die
Craft any weapon
Cure a poisoning
Reach level 7 with your character
Reach the 50th floor
Read three SMS
Loot the dead bird
Fix the elevator without any items
Turn on the TV
Open card lock
Check the cameras
Collect all notes in the game
Get alternative ending
Fight two enemies in one combat and win
Complete the game only eating vegan food
Die in any of the first 10 floors
Die 20 times
Use Retro Cinema perk
Use Hard Times perk
Die 100 times