Burn the note in the attic to unlock this achievement.

Stick your hand down the toilets drain to unlock this achievement.

Read all the notes in the house to unlock this achievement.

Find the secret hand gesture to unlock this achievement.

Show the secret hand gesture to the developers at the pinboard to unlock this achievement.

Wash your hands to unlock this achievement.

Eat the pizza slice to unlock this achievement

Escape the house to unlock this achievement.