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