Official platforms like Steam occasionally host free-to-play weekends where you can download and play the full game for a limited time .

As of February 2026, the game was included as a Monthly Game for PS Plus subscribers .

While the game usually costs around , there are several legal ways to access it at a lower cost or occasionally for free:

Subnautica: Below Zero is a paid standalone expansion developed by Unknown Worlds Entertainment , and while "free download" links for version 1.0 are often advertised on unofficial sites, they typically lead to pirated or unsafe content . To play safely and support the developers, it is best to use official platforms . Official Purchase Platforms

Deep discounts of up to 75% off occur during major seasonal sales on Steam and Epic . Subnautica: Below Zero PS4 & PS5

You can purchase it on Steam and the Epic Games Store .