Subnautica: Below Zero Arrives on iOS and Android March 10, 2026

Subnautica: Below Zero landed on iOS and Android on March 10, 2026, giving mobile players their first chance to join Robin Ayou's search for her missing sister across the frozen depths of Planet 4546B. Unknown Worlds Entertainment and Playdigious, the same publishing partnership that brought the original Subnautica to mobile, collaborated again to port the cold-climate sequel, rebuilding the interface and optimizing the experience from the ground up for touchscreen hardware.

The mobile release carries a launch price of $9.99, though players who pre-ordered on the App Store or pre-registered on Google Play locked in the full game for $8.99, a 10% discount. Playdigious' Facebook post put it plainly: "A game where you'll ask yourself if it's safer on the surface or below the sea (the answer is neither)."

The port is more than a straight conversion. Playdigious and Unknown Worlds built an exclusive mobile UI designed specifically for touch controls, while also confirming MFi controller compatibility for players who prefer physical input. Save data is stored locally and synced to the cloud, meaning players can start a session on a tablet at home and pick it up on a smartphone without any manual file transfers. Game Center achievement tracking rounds out the feature set. On the optimization side, a minor discrepancy exists in the source materials: Unknown Worlds' own developer announcement lists "iPhone 15 optimization (including Pro Max)," while Playdigious' marketing materials and reporting from Pockettactics cite iPhone 17 optimization instead. Both claims appear in official communications, and no correction has been issued by either party.

For anyone coming in fresh, Below Zero is an open-world survival game that takes the underwater tension of the original and layers on a brutal cold climate. Players craft gear, construct bases, and manage temperature threats using thermal suits and heating methods while unraveling the mysteries of planet 4546B and the alien civilization that predates them. Notebookcheck puts the typical completion time at 20 to 30 hours, and the game holds a 91% aggregate on OpenCritic, though that score reflects the existing PC and console versions.

The handheld history of Below Zero has not been spotless. Pockettactics, which awarded the Switch version a 6 out of 10, noted that "Unknown Worlds' beloved series has a bit of a rocky past when it comes to handheld ports," but added that "Playdigious' mobile port of the original game seems to have turned things around." That prior Subnautica mobile release appears to have set the blueprint for this one, with the same care applied to the icy sequel now available in full on both major mobile platforms.