The Makhai are the servants of Kronos and were imprisoned in Tartarus with him. After the humans stopped to pray the gods, the walls of Tartarus start to crumble and the Makhai finally break free. Hades and Ares make alliance with Kronos and take command of the Makhai.
Zeus, Poseidon, Hades and Ares reunite in Tartarus in order to rebuild the walls, however Hades sends the Makhai attack them. They throw their lava on Zeus and Poseidon, who use their weapons to shoot lightnings on them, but one of the Makhai manages to severely injure Poseidon while Ares defeats Zeus. Poseidon then teleports to the Mount of Idols where he dies from his injuries.
Later, the Makhai help Ares to enchain Zeus before bringing him to Kronos so he could absorb his remaining powers and free himself.
Once Kronos is released from Tartarus, he sends the Makhai confront Argos army. They manage to slay many soldiers, but some of them are killed by firing catapults and another is also killed by Agenor. Andromeda engages the fight with her infantry and they subdue one of the Makhai before she kills him, then a second attacks her and defeats her. The Makhai eventually overwhelm Andromeda's army, however Zeus and a redeemed Hades join the battle and use their powers to defeat most of the Makhai.