I reviewed this for my #33in28 series on Thoughty: http://briebeau.com/thoughty/33in28-week-2-reviews/

An excerpt: 

The Mysteries of Addy Sea is a solo horror journaling game by Jessica L. Washburn. In this game, you play a paranormal investigator staying 13 nights at The Addy Sea, a bed and breakfast built by a colonizer and plumbing supplier from Pittsburgh, John M. Addy, for his family. The text notes that The Addy Sea sits on stolen Algonquin Lands, and that it’s supposedly very haunted. There is a warning for paranormal experiences, implied death via a fall, and mild horror themes, though it is on the itchio page solely, unless I’m missing it.

This game is the game in which I realized I can very quickly scare the daylights out of myself – I only managed to actively play through four nights because laughing children gives me nightmares. I have, however, read through the full text and played more casually than I originally planned. If you’re very creative and simultaneously easily spooked, please use a safety tool or two to help you play, because the prompts are simple enough to let your mind go wild. I recommend any horror game include safety tools!

You are given some tools in the narrative to aid your experience playing, and each night you’re asked which you use and why. The tools include an infrared thermometer, a digital voice recorder, an EMF sensor, a camera with night vision, a Ghost Box (a device that sweeps AM/FM radio frequencies), and a journal. You only use the journal as a player, recording your activities and responses to the various events of the game. There are thirteen rooms, and my judgment was that yes, it is definitely haunted!