Once Human (macOS)

Last Updated: Jun 18, 2026

Play Once Human on PC and Mac

Once Human is a multiplayer open-world survival game set in a harrowing post-apocalyptic landscape where an extraterrestrial substance known as Stardust has warped reality itself. Players take on the role of a Meta-Human, one of the rare survivors capable of wielding Stardust's power rather than being consumed by it. With a seamless 256 km² map filled with diverse biomes, terrifying mutated creatures, and deep base-building systems, the game delivers an intense blend of exploration, combat, and cooperative gameplay. You can experience every moment of this massive world on PC through MuMuPlayer, bringing the full scale of Once Human to a larger screen with smoother performance.

The game stands out through its enormous open world featuring environments ranging from frozen tundras and active volcanoes to deserts and treacherous swamps, all seamlessly connected for uninterrupted exploration. Combat is built around teamwork, strategy, and adaptability, challenging players to take on monstrous Deviants that have overtaken the world. Base building goes well beyond survival basics, letting players place structures freely in the wild, add rooms like kitchens, patios, and garages, and secure their territory with traps and defenses. A standout element is the Deviation companion system, where unique creatures including a gun-toting alpaca and a miniature dragon chef fight alongside players, gather resources, and contribute to base operations as long as they are properly cared for.

Playing Once Human on PC through MuMuPlayer brings meaningful advantages given the scale and complexity of the game. Managing a vast open world, coordinating team combat, and overseeing base construction and Deviation companions all benefit from the precision of keyboard and mouse controls, which MuMuPlayer fully supports. The larger display makes navigating the expansive 256 km² map far more comfortable, and MuMuPlayer's stable performance ensures that resource-intensive environments and large-scale battles run without interruption. For players who want to get the most out of every session in Once Human, MuMuPlayer on PC is a natural and practical choice.

About the Game

The world of Once Human has been shattered. A mysterious extraterrestrial material called Stardust swept across the planet, transforming living creatures, vegetation, and even the atmosphere into something unrecognizable and dangerous. Most of humanity perished in the chaos, but a small number of survivors emerged changed in a different way. These individuals, known as Meta-Humans, absorbed Stardust's energy rather than being destroyed by it, gaining abilities that make them uniquely suited to fight back against the horrors that now rule the Earth.

As one of these surviving Metas, players are dropped into a sprawling open world called Nalcott, a seamless 256 km² landscape that spans wildly different environments:

Frozen tundras and snow-covered regions that test endurance and resource management
Active volcanic terrain demanding careful navigation and heat survival
Raging rivers and swamp zones filled with environmental hazards
Sun-scorched deserts alongside rare oases offering brief relief

No two areas feel alike, and the sheer variety of terrain keeps exploration consistently rewarding. Players can hunt for food, cultivate farmland, wage war against rival groups, or simply push deeper into unknown regions to uncover the truth behind the Stardust apocalypse.

Combat in Once Human is not a solo endeavor by design. The creatures and entities born from Stardust corruption, collectively known as Deviants, range from wandering mutated animals to towering ancient horrors that require coordinated group strategies to defeat. Players can team up with others, share resources and roles, and combine their Meta-Human abilities to overcome encounters that would be impossible to handle alone. The emphasis on teamwork and tactical thinking gives battles a depth that goes beyond simple action gameplay.

Base construction is one of the most expressive systems in the game. Unlike many survival titles that confine building to fixed zones, Once Human allows players to establish their base almost anywhere across the open world. Structures can be expanded and customized freely, incorporating:

Living and functional spaces like kitchens, patios, and garages
Storage solutions to safeguard gathered loot and crafted equipment
Defensive installations including traps and weapon emplacements to deter rival players

This freedom encourages players to design a base that reflects both their personality and their practical survival needs.

Adding a layer of charm and utility to the survival experience is the Deviation companion system. These unusual creatures populate the world and can be recruited to join a player's team. Each Deviation brings something distinct to the table: some provide direct combat support, others assist with resource gathering, and some manage base operations autonomously. Examples include an alpaca capable of wielding firearms and a small dragon companion skilled in cooking. However, owning a Deviation comes with responsibility. Players must provide suitable housing, check in regularly, and maintain their companions' wellbeing. Neglecting them risks a rebellion, adding a light but meaningful layer of management to the overall gameplay loop.

Once Human combines survival mechanics, cooperative combat, creative construction, and creature companionship into a cohesive experience set against a richly realized post-apocalyptic world. Whether the goal is unraveling the mysteries of Stardust, dominating rival factions, or building the most fortified sanctuary on the map, the game offers enough variety and depth to sustain long-term play across many different playstyles.