Confirmed storage
50 GB
Official available storage requirement on PC.
Install prep
Subnautica 2 Download Size
Storage planning for launch day. The confirmed number to use before Early Access is the official PC storage requirement.
Quick answer: Official PC requirements list 50 GB available storage. The actual download size can be smaller than installed size and may vary by storefront or platform.
Download size
Not final
The compressed download may differ by platform.
Best prep
Leave buffer
Keep extra space for patches, saves, and shader/cache files.
Platform install notes
Steam
Check the Steam app near launch for download size, preload if offered, and available disk space.
Epic Games Store
Use the Epic launcher install screen for final size and install location.
Xbox / Game Pass
Check the Xbox app or console store page for download size, cloud availability, and Game Preview access.
PC cleanup
Keep more than 50 GB free if possible, especially on drives with limited shader cache or update room.
Related install routes
Use these pages if storage is only one part of the decision.