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