You may already own the game for free if you use these launchers:

For those looking to get the game without a direct purchase:

The developers, Unknown Worlds, occasionally host Free Play Days or free weekends on platforms like Steam and Xbox.

: In 2021, Sony gave Subnautica away for free to all PlayStation users as part of the "Play at Home" initiative; no subscription was required to keep it. 4. Legitimate Ways to Earn the Game

Progress typically carries over if you choose to buy the game afterward. 3. Historical Giveaways (Check Your Library)

: Subnautica is frequently available in the Xbox Game Pass library , allowing subscribers on PC and Console to download and play the full game.