Jack Joyce is the main character in the video game series Quantum Break, developed by Remedy Entertainment. He is portrayed as a man who gains time-manipulating abilities after a failed time travel experiment at the Praxis Institute. Jack's journey revolves around his struggle to control his newfound powers while trying to prevent a catastrophic future. Throughout the game, Jack faces off against Paul Serene, the antagonist who has his own time-manipulating abilities. The narrative intertwines gameplay with live-action episodes, enhancing the storytelling experience. Jack's character embodies themes of choice, consequence, and the impact of time on human lives.