Resonance of Fate is a role-playing video game developed by tri-Ace and published by Sega for the PlayStation 3 and Xbox 360. It was released in January 2010 in Japan and March 2010 in Western territories. The game uses a fast-paced strategic combat system revolving around different types of firearms and combination moves between the three playable characters. A 4K/HD remaster was released worldwide for PlayStation 4 and Microsoft Windows on October 18, 2018.

Resonance of Fate takes place on Earth in the distant future. When atmospheric pollution nearly annihilates life on Earth, the remnants of humanity construct a purification system called Basel. In time, the surviving human population create a civilization around Basel's central tower, watched over by its mechanical core Zenith. Zenith ties human lives to quartz stones, making them immune to the pollution while giving them predetermined social status and lifespans. The three protagonists—Zephyr, Leanne, and Vashyron—form a mercenary group that take odd jobs for the populace of Basel. During their missions, they discover a plan by the city's ruling Cardinals to subvert Zenith's rule, and discover their own connections to the Cardinals' plans.

Resonance of Fate is set in a steampunk environment with combat involving guns. Developed with a Western audience in mind, it was the first collaboration between tri-Ace and Sega which formed due to the originality of the project and Sega's interest in gaining a high-profile role-playing game for its catalogue. It was designed around tri-Ace's proprietary ASKA Engine, which was shared with titles such as Star Ocean: The Last Hope. Its gameplay was influenced by multiple Western action films including The Matrix. The music was co-composed by Motoi Sakuraba and Kohei Tanaka. Reception of the title was mixed, with its gameplay receiving the majority of praise.