Here is the full list of all 28 The Padre achievements.
Clear up the cellar prison cells
Trap the skull dog
Finish the animated Armor
Help out the ghost detective
Solve the vase puzzle
Solve the clock puzzle
Empty the flask of angel tears
Meet Benedictus for the first time
Banish the horror back to its realm
Solve the carpet puzzle
Drink from the tainted well five times
Enter the first mirror world
Remove the ghost threat from the library
Find all the scrolls of Ramirez
Kill five enemies with a melee weapon
Two headshots in a row
Bring the first zombie back to the grave
Kill some spiders in the name of the Lord
Use your brain to win over an enemy
Banish the hall monster
Visit all the mirror worlds
Find a secret passage
Open the way with music
Get rid of the Dumpling
Clean up the dining room
Reach the roof
Find a hidden book
Try an epic board game