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Nine Hours, Nine Persons, Nine Doors (DS)

Hints & cheats

Previews
You can unlock Previews by beating the game under a certain ending. These Previews guide you along the path you should take to get the True ending.
Action	Result
Clear the game with the Safe ending.	Preview A
Clear the game with the True ending or the Coffin ending.	Preview B
Replay rooms you have already cleared
You can unlock the feature to re-solve a room's puzzles after completing the game. After completing the game once, this feature will be unlocked.
Action	Result
Complete the game for the first time	Memories of escape