Daggerheart is a tabletop roleplaying game for one Game Master ("GM") and 2-5 players. Each game session lasts about 2-4 hours, and Daggerheart can be played as a one-shot or a multi-session campaign of any length.
During a session of Daggerheart the GM describes situations, narrates events, and controls any adversaries or obstacles that the Player Characters ("PCs") encounter. The players, in turn, roleplay their PCs' reactions to the scenario presented by the GM. If the outcome of a player's action depends on fate or fortune, the GM calls for an action roll.
When a player makes an action roll, they utilize Duality Dice—two differently colored 12-sided dice ("d12s") representing Hope and Fear. The Duality Dice are rolled, relevant modifiers are added to the results, and the total is compared to a Difficulty set by the GM. If the total meets or beats the Difficulty, the player succeeds. If it's lower, they fail. In addition, the situation changes based on which Duality Die rolls higher, either giving the player helpful Hope tokens or generating terrifying Fear tokens for the GM.