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
Collect all evidence
Talk to all NPCs in a single playthrough
Get a high score in RunBums
Find all comic books
Explore the bathrooms
Talk to the call girl
Find Peepaw's ouija board
Start the laundry
Get a high score in Porksy's Revenge
You enjoy TV
Finish the intro