Here is the full list of all 15 Bloodwash achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Found the gun and ammo
Talk to the call girl
Explore the bathrooms
You enjoy TV
Finish the intro
Face to face with a nightmare
Find Peepaw's ouija board
Start the laundry
Survived the Womb Ripper
Finish the epilogue
Get a high score in Porksy's Revenge
Get a high score in RunBums
Collect all evidence
Talk to all NPCs in a single playthrough
Find all comic books