An investigation journal for Call of Cthulhu

Call of Cthulhu lives on its clues: the name in the ledger, the handout nobody read closely, the cellar everyone agreed not to go back into. Aether Observer keeps the whole investigation, written up from your own session notes.

Speaks Call of Cthulhu

Set your game system to Call of Cthulhu and the write-ups use the words your table already uses: the Keeper, the investigators, scenarios, clues and handouts, and the slow toll on their Sanity. It works the same for a one-night scenario or a long campaign.

For the Keeper

• Start your prep from a clean recap of what the investigators actually found, and what they missed.
• Every person, place and strange book your notes mention is tracked in Lore.
• Keep a long campaign's threads (and its red herrings) straight.

For the investigators

• A recap to read before the next session, so the table remembers what the clues pointed to.
• Your investigator's story, up to the moment things went wrong.
• Portraits of your investigators, in whatever art style suits your game (Dark & Gritty works well).
• A loot sheet that fills in from your notes: check what the investigators found (tomes, artefacts and the rest), and track who has what.
• A quest log that keeps itself up to date: new quests and progress from each session's notes, ready for the table to check.

How it works

Start a TTRPG Log, add your notes after each session (typed or photographed), and each session becomes a chapter of the investigation. It's written only from what's in your notes.

More on turning session notes into a story →