The developers of Subnautica 2 announced that the game will be in early access for 2-3 years before its release.
As noted by the Unknown Worlds studio, at first, players will be able to evaluate only one biome and only part of the story campaign. The amount of content will gradually expand, but at the start everything will be like this. Also in early access, you can evaluate the multiplayer mode, which will allow you to go through the adventure with friends.
Subnautica 2 is expected to be released in 2025, the project will receive versions for PC and consoles.