: A limited resource you can "spend" with an Investigative Ability to get a bonus benefit or extra information that isn't strictly necessary to solve the case but might make it easier.

: Every protagonist has "Sources"—NPCs they can visit for expertise they don't personally have (e.g., a morgue attendant for medical info). This keeps the investigation moving without requiring a full party.

: If the player goes off-track, don't force them back. Move the necessary clues to where they decided to look instead. Cthulhu Confidential: From a Player's Perspective

: Because there is only one player, they can easily get stuck. Map out the clues and locations beforehand to ensure there are no dead ends.

is a tabletop role-playing game from Pelgrane Press that uses the GUMSHOE One-2-One system , specifically designed for one Game Master (GM) and exactly one player . Unlike traditional group games, it places a single protagonist in a noir-inspired 1930s-40s setting where they face cosmic horrors. Essential Rules for Players

: These are your bread and butter. You automatically succeed and find core clues if you are in the right place and use the right ability; no dice roll is required.