Investigation and exploration are key elements in Cthulhu's Tabletop, as players take on the roles of investigators trying to uncover the truth behind mysterious and unsettling occurrences. Here are some rules for conducting investigation and exploration in a Call of Cthulhu game...

Gather clues

 As investigators, the players will need to gather clues and information about the case they are working on. This can be done through talking to NPCs, searching for physical evidence, or examining documents. The GM should provide the players with a variety of clues to help them piece together the mystery.

Use skills

 The players can use their characters' skills and abilities to gather and analyze clues, as well as interact with NPCs and navigate their environment. For example, a character with a high Investigation skill might be able to uncover hidden clues more easily, while a character with a high Persuasion skill might be able to extract more information from NPCs.

Make deductions

 As the players gather clues, they can use their characters' reasoning and problem-solving skills to make deductions about the case. The GM can provide the players with a deduction board or other tool to help them organize and track their clues and deductions.

Take risks

 As the players investigate and explore, they may encounter dangers and obstacles that require them to take risks. The GM can use dice rolls or other mechanics to determine the outcome of these risks.

Solve the mystery

 The game will come to an end when the players have gathered all the clues and solved the mystery, or when their characters are no longer able to continue. The GM should provide a satisfying resolution to the case and reward the players for their efforts.