001 Earth is a platform, open-world sandbox game released on Steam on March 31, 2022. Set during the 5th to 6th century, it primarily focuses on the Dumnonii, a Celtic tribe from ancient Britain, while drawing inspiration from various historical and fictional narratives. The game's world is expansive, allowing players to explore, battle monsters, delve into dungeons, loot equipment, or engage in peaceful activities like farming, blacksmithing, and trading. Players are free to choose their path, whether as a warrior or pursuing other roles, and can shape the world around them through their actions.

The game introduces an innovative system for warriors, removing traditional strength caps and enabling players to grow in power infinitely. With this progression, players can eventually reach the ability to destroy entire universes. However, this immense power comes with a risk: King Arthur, a pivotal character in the game, will only intervene in conflicts when his kingdom is threatened, and any hostile actions against him may result in the player's erasure from existence without warning. King Arthur's portrayal in 001 Earth is much more powerful than in traditional Arthurian legends, and the game dives into the multiverse, exploring fictional verses and stories that may never be told in our reality.

While the base game revolves around King Arthur's era, with plans to expand throughout iconic historical periods and folklores, the developers have stated that future expansions will introduce a wider range of timelines and mythologies as the game matures. As the game's features stabilize, the developers plan to extend the story to cover more of Earth's rich history and beyond, promising an evolving experience that blends real and fictional histories for players to explore.