When Earth’s relentless overpopulation crisis reached critical levels, visionary scientists joined forces to build Altile—an artificial haven designed to relieve our home planet. For a brief golden era, humanity finally tasted unity and peace, even decommissioning its legendary half-man, half-robot defenders known as the RoboWarriors. But the tranquil horizon is shattered when the interdimensional Xantho Empire, led by the merciless Xur, descends upon Altile to terraform it for conquest. With hope dwindling, Altile’s last survivors send a desperate distress call—and Earth answers by reactivating its most advanced defense unit, ZED (Z-Type Earth Defense), to race against time and save this new world.

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