Subnautica 2 systems: what official updates establish

This page was rebuilt on 30 September 2026 so that every statement traces to official material. The previous version mixed confirmed systems with unsourced detail about meters, recipes and progression; that detail has been withdrawn rather than reworded.

Confirmed systems

• DNA Modification / Biomods — official material describes collecting creature DNA to unlock biological upgrades. The “Adaptive Measures” update raised the unlockable Biomods from four to six and added Bioscanner scans that unlock extra passive Biomod slots.
• Sculptural base building — official material describes a sculptural system rather than a rigid grid, letting players shape bases into the seafloor.
• Ocean currents — official material describes downward and lateral currents that can pull players past their planned depth.
• Co-op — four-player co-op with crossplay between PC and Xbox; official updates added proximity voice chat, player revives, player trading, emotes and Tracking Tags. Shared inventory and shared Data Entries are confirmed co-op defaults.
• Tool-based creature deterrence — the Survival Multitool and Sonic Resonator deter creatures without killing them, per official update notes.

What this page does not publish

Meter-by-meter survival rules, recipe tables, damage values and step-by-step progression were part of the withdrawn text. Official updates describe balance changes at patch level — aggression timing, aggro range, flare effectiveness, Survival Tool effectiveness — and do not publish per-item numbers. Inventing those numbers back in would repeat the original mistake.

Version discipline

Early Access systems change between updates: a harvesting method can be removed, an unlock can be rebalanced. Each claim on this page is tied to a named update, and the date of this review is 30 September 2026. Re-check the linked official notes before relying on a detail in a later build.