Which game has the most innovative mechanics or features that changed the industry?

[Scorpion]

Which video game do you think introduced the most innovative mechanics or features that transformed the industry? Can you explain what those mechanics were, how they changed gameplay, and their impact on other games that followed?

[killamch89]

The introduction of bullet time in 'Max Payne' forever changed action gameplay by giving players the power to slow down time, making combat more strategic and visually spectacular.