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Subnautica cover art

Subnautica

Deck VerifiedAdventureIndieJan 23, 2018Unknown Worlds Entertainment
Online once to activate

Steam lists no extra DRM or account for this game. Install and sign in to Steam while online once, then switch Steam to Offline Mode.

Buy on Steam $7.49

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Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.

Offline details by store

StoreStore flagsOffline statusWhat that meansSource
SteamNone listed Online once to activate Steam lists no extra DRM or account for this game. Install and sign in to Steam while online once, then switch Steam to Offline Mode. Steam store page

Statuses are read from each store's own information, not tested by us, and can change with patches. Check the store page before you buy. How we decide. Steam Deck rating from Valve's compatibility report.

Last data refresh: October 26, 2026.

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