One Million Copies in One Hour: Subnautica 2 Delivers One of Steam’s Biggest Early Access Launches Ever

Game: Subnautica 2  |  Promotor: Unknown Worlds Entertainment  |  Editorial: Unknown Worlds Entertainment / KRAFTON  |  Platform: PC (Steam)  |  Lanzamiento de Early Access: May 14, 2026  |  Early Access Price: $20.99 USD  |  Full Release Target: 2028 (estimated)

Subnautica 2 launched into Early Access on Steam on May 14, 2026, and delivered one of the strongest opening days any survival game has seen on the platform. The game peaked at 467,582 concurrent players on launch day according to SteamDB, and the official Subnautica X account confirmed one million units sold within the first hour. Eleven years after the original Subnautica, the sequel arrives with the weight of enormous expectations and, by almost every early measure, meets them.

Launch Day Numbers

The concurrent player peak of 467,582 places Subnautica 2 among the top 30 most-played games in Steam history. Notably, it surpasses well-known titles including Helldivers 2 and Sons of the Forest. Furthermore, SteamDB currently lists the game at fifth in daily active users and second in the global top sellers chart, five days after launch.

Additionally, SteamDB’s owner estimates paint a broader picture of the game’s reach. Three tracking services estimate between 2.23 million and 3.39 million total Steam owners as of May 19. The spread in those figures reflects the inherent uncertainty of third-party estimation methods, so the numbers should be treated as indicative rather than exact. However, all three trackers agree the game has found an exceptionally large audience in its first week.

One Million Sales in One Hour

Unknown Worlds shared the one million sales milestone directly via its official social channels just one hour after the game went live. That figure refers to total units sold across all editions on Steam. The developer did not break down regional sales or provide a full revenue figure at that time.

In contrast to a typical Early Access launch, Subnautica 2 entered the market at $20.99. The studio has confirmed the price will increase after Early Access ends. Consequently, players who buy in early pay less than they would at the 1.0 release, which follows the same approach Unknown Worlds used with the original Subnautica and Subnautica: Below Zero.

Player Reviews: What People Are Saying

As of May 19, Subnautica 2 holds a Very Positive rating on Steam with over 64,000 total reviews, of which approximately 90 percent are positive. Early player feedback highlights several standout strengths alongside a handful of expected Early Access limitations.

What Players Praise

• Base building: Players consistently highlight the ability to dynamically scale walls and rooms as the game’s strongest feature, calling the system intuitive and fun to experiment with
• Visual quality: Reviewers describe the graphics as a major step up from Subnautica 1, with more detailed environments and stronger creature design
• Atmósfera: The sense of unknown danger and exploration carries over from the original, with several reviewers noting the game feels creepier than its predecessor
• Content depth: Multiple players noted being surprised by Act 2 content they did not expect to find in a launch version of Early Access

What Players Criticize

• Rendimiento: High graphics settings cause frame rate drops on some systems, even those above the recommended specifications
• Multiplayer stability: Players report issues with the co-op mode, including disconnections and desync problems
• Map size: Several reviewers note the starting area feels small, though most acknowledge more biomes are planned for future updates
• Story content: The narrative is limited at Early Access launch, which the developer acknowledged ahead of release

What Early Access Includes Now

Según la official Steam page, the current Early Access version includes the following core systems:

• Single-player mode and online co-op for up to four players
• Multiple biomes to explore on the new alien ocean world
• Base building with dynamic wall and room scaling
• The Tadpole submersible for deeper exploration
• Crafting and resource gathering systems
• Four pre-designed playable characters, with more planned
• An opening narrative section, with more story content coming in updates

Moreover, Unknown Worlds is explicit about what is not yet finished. The developer describes the current build as imperfect and invites players to join the development process by providing feedback. As a result, buyers should approach Subnautica 2 as a foundation rather than a complete game.

The Road to 1.0

Unknown Worlds estimates Early Access will last approximately two to three years, placing a full release somewhere around 2028. The studio plans to add new biomes, creatures, craftables, and narrative content through regular updates. Additionally, bug fixes and performance improvements will run alongside content additions throughout the Early Access period.

The developer uses an open development approach it has applied to previous titles. Player feedback directly shapes update priorities, and the team communicates actively through its official Discord. That model worked well for both the original Subnautica and Below Zero, giving the studio a track record players can reference when weighing an Early Access purchase.

PC System Requirements

Bottom Line

Subnautica 2 has delivered exactly the kind of Early Access launch that makes the wait feel worth it. Nearly half a million concurrent players, one million sales in an hour, and a 90 percent positive review score are numbers that very few games at any stage of development reach. The current build has real rough edges in performance and multiplayer stability, and the map and story are both works in progress. Nevertheless, Unknown Worlds has given players a strong foundation, a clear roadmap, and a proven track record of delivering on Early Access promises. For fans of the original, there is very little reason to wait.