How long to beat Subnautica 2 (Early Access)? See average playtime for normal and completionist runs, co-op impact on game length, and future Early Access updates.
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How Long to Beat Subnautica 2 (Early Access)
Average Playtime is Around 15-20 Hours

According to details shared by the developers at Unknown Worlds, a standard playthrough of the current Early Access version of Subnautica 2 takes around 15 to 20 hours to complete.
No True Ending Yet in Early Access
Since the game is still in Early Access, there is currently no final ending or end credits sequence. Your total playtime will vary depending on how much time you spend exploring biomes, collecting resources, reading PDA logs, and expanding your underwater bases.
Playtime Breakdown by Player Type
Playtime Varies Depending on Your Playstyle
Your total playtime can vary significantly depending on how you approach the game. Below are estimated completion times based on developer information and community testing.
Normal Playthrough (15-20 Hours)

Players who follow the main progression path while doing moderate exploration can expect to spend around 15 to 20 hours in the current build.
Speedrun Playthrough (5-8 Hours)

Developer test runs showed that experienced players who already know the map layout and progression route can clear the current content much faster by skipping optional exploration and story elements.
Completionist Playthrough (Up to 70 Hours)

Completionist players who want to fully scan creatures, unlock all available technology, discover every biome, and collect every PDA log can easily spend up to 70 hours or more in the game.
Does Co-op Change the Game Length?
Co-op Uses the Same Story and Content

Subnautica 2 supports online multiplayer for up to 4 players, but co-op does not include separate missions or a different campaign. Multiplayer players experience the same progression and story content as solo players.
How to Host Multiplayer and Join FriendsExploration is Faster with Friends

While the content remains the same, co-op can speed up progression since multiple players can gather resources, explore dangerous areas, and build bases simultaneously. However, groups often spend more time building larger bases and exploring together, which can also extend total playtime.
Future Early Access Updates
Early Access is Only the Starting Point

The developers confirmed that the current Early Access release only contains the initial portion of the planned content. Additional updates will continue expanding the game throughout development.
More Content Planned in the Future
Unknown Worlds stated that they plan to add more biomes, story chapters, crafting options, and exploration content during Early Access leading up to the full v1.0 launch.
Early Access Overview and Update Roadmap