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