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