Subnautica 2 is a mega hit with 2 million sales in 12 hours

Subnautica 2 is off to an incredible start as the hotly anticipated game goes platinum in its first hour of availability.

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Unknown Worlds is seeing massive success with the release of Subnautica 2, and the developer today announced the game has surpassed over 2 million copies in its first 12 hours on the market. That's double the sales of the game's previous milestone listed above, making Subnautica 2 among the fastest-selling games of 2026.

The sequel, which was at the center of a contentious legal battle, is seeing strong engagement on Steam where it is currently the #1 top selling game with over 467K concurrent peak players. The game's success also pushes total Subnautica franchise sales past the 20 million mark--before the announcement was made, the series was at 18.5 million copies. The game is currently being sold on Steam, the Epic Store, and Xbox, all via early access.

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It was also previously revealed that Subnautica 2 had over 5 million wishlists, which might indicate strong intent to buy ratios from users who gauged interest.

The pent-up demand for Subnautica 2 isn't typical, however it does follow recent trends of key early access games becoming breakout successes. We've seen hits like Windrose achieve 1 million sales in 6 days, as well as thunderous hits like Slay the Spire 2 with its 3 million sales in 7 days--an early access game that also took advantage of anticipatory demand.

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On the heels of the huge early access launch, the devs have outlined what's coming to Subnautica 2 in the coming months.

If these sales continue, Unknown Worlds' management may win their bonus after all--if they haven't already.