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