Survive a supernatural open world, fight mutants, and build your destiny in this epic open-world anime gacha survival adventure

Once Human delivers a supernatural open-world survival experience where every step into the unknown tests your courage. Scavenge for supplies, build your territory, and confront terrifying mutants while uncovering the truth behind the world’s downfall. Explore an anomalous continent filled with danger, mystery, and strange phenomena.

Roam a seamless 256 km² sandbox packed with exploration, seasonal challenges, and PVE or PVP encounters. Whether you enjoy open-world anime gacha action, co-op survival crafting, or base-building RPG adventures, this apocalyptic journey lets you carve your own path. Gather allies, establish a doomsday order, and let creativity reshape your world.

Build anywhere, tame Anomalies, and wield powerful customizable weapons as you strive to survive fairly—no pay-to-win. Your apocalypse, your rules.

• Supernatural Exploration: Traverse a massive seamless world—snowfields, volcanoes, ruins—and face rampant monsters across Naikot.
• Co-op & Large-Scale Play: Form squads of 4 or warbands of up to 50 to resist mutants, craft elite gear, and build tactical fortresses.
• Creative Base-Building: Construct secure fortifications, luxury villas, fantasy parks… or put wheels on your home for mobile survival.
• Anomaly Companions: Contain and deploy combat, territorial, and crafting Anomalies that assist you in battle, production, and exploration.
• Advanced Gun Mod System: Customize close-, mid-, and long-range weapons with diverse blueprints for the perfect apocalypse loadout.