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