Investigation
Investigation is an Intelligence-based skill for when you look around for clues and make deductions based on those clues. You might deduce the location of a hidden object, discern from the appearance of a wound what kind of weapon dealt it, or determine the weakest point in a tunnel that could cause it to collapse. Poring through ancient scrolls in search of a hidden fragment of knowledge might also call for an investigation check.
Untrained Actions
Subskills
Cryptography
Cryptography is used when someone wants to hide information inside something else. Players can pick up the hidden meaning in a story, a password drawn into a painting, or a message left for a member of a hidden society.
Deduction
The ability to see connections between seemingly random facts, and the process of reaching a decision or answer by evaluating known facts.
Information Gathering
Walking around town, picking up rumors, is a common adventurer past time. Plying locals with booze to get secrets out of them is a great cover for getting drunk in town.