Here is the full list of all 30 House of Hell achievements.
Find all the potential weapons in the house
Find the secret room
Use a pot-plant in a clever way
Kill five very large dogs
Collect 30 FEAR points
Check out all the paintings on display
Meet a ghoulish creature
Find yourself stuck in two story loops of doom
Get maximum points in the torture word game
Find your way into a sacrificial ceremony
Collect 10 FEAR points
Escape from an invisible entity
Fall under the spell of a vampire
Have faith in a ghost
Collect your first FEAR point
Find the ultimate ending in Free Read mode
Find the ultimate ending in Medium mode
Find the ultimate ending in Hardcore mode
Find all the artwork in House of Hell
Escape the House of Hell
Collect 70 FEAR points
Collect 100 FEAR points!
Find all art pieces for Dan Maxwell's alternative cover
Get a Hunchback drunk
Find all the keys within the house
Meet all the zombies within the house
Enter all the locations in the house
Deal with a mischevious poltergeist
Slip in a pool of blood
Sample all of the wine in the house