Exuviae

From the introduction:

Exuviae is a horror-noir tabletop roleplaying game for one to four players and a games master.
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Exuviae uses a single pack of playing cards to simulate uncovering a conspiracy: taking something hidden & shining a light on it for a different, greater, audience. Each player assumes the role of an investigator, though these needn’t be professional detectives.

User summary:

This intriguing game requires a stripped pack of French playing cards. The game played with the cards is complex. The game document includes several action tables to be used with the card game.