Terminator: Dark Fate - Defiance: Evolution is a major expansion for the real-time strategy game set in a dystopian future. Players take on the role of Lieutenant Church as they lead the Resistance into the cold landscapes of Canada, facing off against the Legion’s advanced combat machines. This expansion features a new single-player campaign consisting of eight missions, where players must navigate tactical challenges including sabotage, defense, and large-scale assaults while vying for humanity's future against the backdrop of evolving warfare.

The expansion introduces new units and technologies that enhance gameplay, such as the Rev 6 mk 2 and augmented soldiers, which allow for advanced combat tactics. Players can also utilize new artillery and armored units like the Integrator Plasma Multi-Barrel Mortar and Leopard C2 MEXAS. With atmospheric environments and a gripping narrative, Evolution serves as a pivotal chapter in the Terminator saga, exploring themes of transformation and the ongoing struggle between man and machine.