Unknown Worlds today announced that Subnautica 2 has surpassed 2 million copies sold worldwide within 12 hours of launch, while continuing to hold the No. 1 position on Steam’s global top sellers charts across multiple countries.
Peak concurrent players across Steam, the Epic Games Store, and Xbox exceeded 651,000, with Steam alone reaching a peak of more than 467,000 concurrent players. This marks approximately nine times the all-time peak concurrent player count of the original Subnautica, which launched in 2018.
Player response has remained strong following launch. Subnautica 2 currently holds a “Very Positive” user review rating on Steam, with 92% positive reviews. Frequently praised elements include the game’s Unreal Engine 5-powered underwater visuals, four-player co-op multiplayer, survival and crafting systems, and narrative experience.
The game also generated significant momentum across livestreaming platforms. On Twitch, Subnautica 2 reached more than 413,000 peak concurrent viewers, ranking No. 1 across all categories. YouTube Live reached more than 109,000 peak concurrent viewers, ranking No. 1 in the gaming category.
Developed by Unknown Worlds, founded by Charlie Cleveland and Max McGuire, Subnautica 2 is the official sequel to the genre-defining Subnautica series, which has sold more than 18.5 million copies worldwide. Set on a new alien world within the Subnautica universe, the sequel introduces new ecosystems, enhanced visuals powered by Unreal Engine 5, and for the first time in the series, optional co-op for up to four players, allowing players to survive and explore together.
Subnautica 2 is available now on Steam, Xbox (Series X|S consoles and PC), and the Epic Games Store. Players can learn more by visiting the official Subnautica website and social media channels (Discord | X | Facebook | Instagram | TikTok | Twitch | Bluesky | Threads | YouTube).
