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