Here is the full list of all 11 The Horror Story: Remastered - there are The Prequel achievements.
Complete the Basement.
Complete the Bush Maze level.
Complete the Maze.
Play the game normally.
Get jumpscared.
Recapping from Scuffy Game's live event.
Okay, to recap...
Wait... Wait, wait, wait.
The bad ending.
The good/true ending.
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