The Cue System is a rules-light RPG system by Catalyst Game Labs that is all about creating a story. Using Cues as building blocks, you will construct a plot and narrate your character's way through the story.
The game is played without a gamemaster, instead the players take turns being the Lead Narrator, using the cues and tags for the scene and the NPCs to move the story forwards, other players control their own character and uses the cues on the character sheet to advance their part of the story.
The system was first invented for Cosmic Patrol, where each character had 5 stats; Brawn, Brains, Charisma, Combat, and Special, represented by dice (D4, D6, D8, D10 or D12), and a Luck stat which is a fixed number.
When tests are called for a D12 plus the appropriate Stat Die (plus modifiers) is rolled against a D20 in order to succeed.
In combat the Combat Die (plus modifiers) is rolled against the opponents Combat Die (plus modifiers).
If the characters "Special" category applies, the Speciel Die is used instead of the standard Stat/Combat Die.
If the Stat/Combat/Special Die ever matches or exceeds the Luck Stat, there is a success, no matter what.
In the Valiant Universe RPG these stats were changed to Might, Intellect, Charisma, Action, Power and Luck. In addition each character could have several Powers, each with their individual Power Die. In case where a Power could be used, the Power Die is rolled in addition to the normal Stat/Action Die, and the lowest of the two dice is discarded.
Shadowrun: Anarchy uses a variant of the Cue System where there is a traditional gamemaster. In addition it uses the multiple D6 that the traditional Shadowrun system uses.
The Cue System is credited to Matt Heerdt.