Here is the full list of all 31 Deadlight achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Finish Randall's dream
Kill an enemy with a single melee attack
Beat the high score in Sport Daisy
Beat the high score in Madness Mansion
Find all of Randall's memories
Push a zombie over a railing
Get to the military control
Follow the Ratman to his den
Tackle an enemy
Roll to avoid lethal fall damage
Survive a close encounter
Perform a combo on an enemy
Execute an enemy
Reunite with Stella
Tackle a door
Escape from the warehouse
Find a page of Randall's journal
Finish Randall's nightmare
Finish Randall's flashback
Reach the junkyard
Face someone from Randall's past in the Park
Make it to the end
Get 100% of Deadlight
Perform a headshot
Find the first health expander
Beat the high score in Raven Thunder's Rock Legend
Get infected by a friend on the leaderboards
Find Parker in the hockey arena
Reload the revolver really fast
Find all the IDs
Finish the Nightmare mode