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 a page of Randall's journal
Finish Randall's dream
Finish Randall's nightmare
Finish Randall's flashback
Face someone from Randall's past in the Park
Get 100% of Deadlight
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
Perform a headshot
Roll to avoid lethal fall damage
Reload the revolver really fast
Execute an enemy
Push a zombie over a railing
Get to the military control
Kill an enemy with a single melee attack
Tackle an enemy
Reach the junkyard
Perform a combo on an enemy
Survive a close encounter
Tackle a door
Escape from the warehouse
Make it to the end