Jack Joyce

 is a character in Quantum Break.

Summary
Jack Joyce is a principle protagonist in Quantum Break. After witnessing the failure of a time-travel experiment at Riverport University, he finds he has the ability to stop moments in time, reaching "zero-state"; he also has the ability to pull people and objects out of zero state by touching them and keeping hold.

Jack's only relative, his brother William Joyce, invented the device which allows for the harnessing of the chronon field. Jack and Paul Serene used to be best friends; the extent of this relationship is currently unknown.

Powers
Enter zero-state, freezing time around himself. Extract people and objects from zero-state.

Trivia
Jack's name is an extension of a long-running practice of having names tenatively related to the core principles and philosophy of the title. Like "Max Payne" and "Alan Wake", Jack's name sounds like "choice", mirroring the choice driven narrative of Quantum Break.