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