Set years after the fall of Hyperion, the world of gods and mortals remains fractured in God-Slayer Returns: Immortals 2 (2026). The legend of Theseus, once a simple man who rose to challenge the tyranny of the gods, has faded into myth. Yet whispers begin to spread across the lands when ancient temples stir with a dark energy, signaling that the war between heaven and earth is far from over. As chaos brews, a new threat emerges—one far more dangerous than the fallen King Hyperion.

Theseus, now living in exile and burdened by the cost of his past victories, is forced out of hiding when villages are mysteriously destroyed overnight. Survivors speak of shadowy beings immune to mortal weapons, creatures born from the remnants of divine power. Reluctantly, he takes up his sword once more, knowing that he may be the only one capable of confronting whatever is rising from the ashes of the old gods.

Meanwhile, on Mount Olympus, the remaining gods are divided. Some believe humanity must be controlled to prevent further rebellion, while others see Theseus as a necessary force of balance. Athena secretly guides him again, though her influence has weakened, while Ares seeks to manipulate the growing conflict for his own gain. The fragile peace between gods and mortals begins to shatter as old rivalries reignite.

As Theseus journeys across ruined kingdoms, he gathers a small group of allies, including a fierce warrior seeking vengeance, a priestess who can hear the voices of forgotten gods, and a former enemy whose loyalty remains uncertain. Together, they uncover a chilling truth: an ancient deity, erased from history, is awakening—one who feeds on both gods and humans alike, seeking to remake the world in its own image.

The group faces relentless trials, from battling cursed armies to navigating treacherous alliances with gods who may betray them at any moment. Theseus himself struggles with doubt, haunted by visions that suggest his destiny may not be to save the world, but to destroy it. As the line between hero and monster begins to blur, he must confront what it truly means to be a god-slayer.

In a climactic final battle that spans both the mortal realm and the heavens, Theseus and his allies confront the ancient force in a desperate attempt to prevent total annihilation. Sacrifices are made, loyalties are tested, and the fate of both gods and humanity hangs in the balance. Victory comes at a devastating cost, leaving the world forever changed.

In the end, Theseus disappears once more, his legend reborn but his fate uncertain. The gods retreat, weakened and wary, while humanity is left to forge its own path. Yet as the final scene reveals, the cycle of power and rebellion is far from over, hinting that the age of immortals may never truly end.