Gundam Seed: O.M.N.I. vs Z.A.F.T. is a third person arcade game based on the Gundam Seed franchise. Similarly to Mobile Suit Gundam: Gundam vs. Zeta Gundam, the player can choose to ally themselves with either O.M.N.I., Z.A.F.T. or Blue Cosmos and fight against the other factions. The Arcade Mode has 9 stages plus a bonus Extra Stage.