Full list of all 25 Haunt the House: Terrortown achievements.
The base game contains 10 achievements, and there are 3 DLC packs containing 15 achievements.
Complete the game
Reach full atmosphere in every building
Use the Zebra in the Museum to its full potential
Use the Tube in the Museum to its full potential
Freak out 5 people at once
Cause 10 window jumpers
Possess every object at least once
Use every spook on every item
Use all 10 ghosts
Complete the game with no window jumpers
Reach full atmosphere in the North Pole level
Use the right Banner in the North Pole level to it's full potential
Complete the North Pole level
Possess every item in the North Pole level
Use every spook on every item in the North Pole level
Reach full atmosphere in the Mansion House level
Use the left Painting in the Mansion House level to it's full potential
Complete the Mansion House level
Possess every item in the Mansion House level
Use every spook on every item in the Mansion House level
Complete the Ghost Train level
Use the Bigfoot in the Ghost Train level to it's full extent
Reach full atmosphere in the Ghost Train level
Possess every item in the Ghost Train level
Use every spook on every item in the Ghost Train level