Realms of the Haunting

Hints:
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Early on, you'll find a box of matches. Try them on 
everything that looks like it could be lit, especially 
candles.

Don't waste ammunition in the room where the soldier 
automatons keep appearing. This one has a puzzle solution. 
Hit all three handprint buttons on the walls, and a fourth 
button will appear in the little side pocket of the room 
until you hit that fourth handprint, the automatons will 
never stop coming.

Do you trust in time? Yes, you do.