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