Comparisons / Subnautica 2 vs Below Zero
Subnautica 2 vs Below Zero
Below Zero (2021) was a smaller, narrative-led spinoff set on the same planet as Subnautica 1. Subnautica 2 (May 2026 EA) is a full sequel on a new planet with 4-player co-op. Here's how they line up.
At a glance
| Aspect | Below Zero (2021) | Subnautica 2 (May 2026, EA) |
|---|---|---|
| Setting | Sector Zero on planet 4546B (same world as SN1) | Planet Proteus — new ocean moon, ~20,000 ly from Earth |
| Player | Robin Ayou, voiced protagonist with backstory | Alterra Pioneer, printed by NOA, reprint #50,000 |
| Scope | Smaller, more linear, narrative-led | Open survival sandbox; story still in development |
| Land sections | Yes — significant on-foot Arctic surface exploration | No — pure underwater |
| Multiplayer | No | Yes — 4-player co-op, full crossplay |
| Vehicles | Seatruck (modular), Prawn Suit, Snowfox hoverbike | Tadpole (Scout Ray / Haul Rig chassis); Prawn + Large Sub on roadmap |
| Story style | Direct character drama (Robin's sister, Sam) | Corporate / AI-mediated; NOA as ambiguous narrator |
| Launch state | 1.0 complete | Early Access — story incomplete |
Setting and continuity
Below Zero stays on 4546B — the planet from Subnautica 1 — moving the action to a colder Arctic-themed region called Sector Zero, set roughly two years after SN1. You play Robin Ayou, a xenobiologist investigating her sister Sam's death. The story is direct, voice-acted, and on rails relative to SN1.
Subnautica 2 leaves 4546B entirely. The setting is Proteus, an ocean moon in a binary star system roughly 20,000 light years from Earth, orbiting a ringed gas giant. There's no return. You're a Pioneer printed by the colony AI NOA aboard the colony ship CICADA, with Alterra as the connective tissue back to the earlier games. Story explained covers the full narrative.
Vehicles
Below Zero replaced SN1's Seamoth and Cyclops with the Seatruck, a modular train of segments you could attach and detach. It also added the Snowfox hoverbike for surface Arctic sections, and kept a redesigned Prawn Suit for depth.
Subnautica 2 abandons all of those. At EA launch you have only the Tadpole — modular by chassis (Scout Ray for speed, Haul Rig for cargo/co-op), with upgrade modules. A new Prawn Suit (SN2-specific redesign) and a Cyclops-equivalent Large Submarine are on the roadmap but not playable at launch.
Multiplayer
Below Zero is single-player only. Subnautica 2 is a 4-player co-op game (also fully playable solo), with crossplay across Steam, Epic, Xbox Series, Xbox PC, ROG Xbox Ally, and Game Pass. This is the biggest practical difference. See the co-op hub.
Tone
Below Zero leaned heavily into character — Robin's grief over her sister gives the game an emotional throughline that's tighter and more conventional than SN1's loneliness or SN2's corporate-mediated existence. Subnautica 2's tone is closer to a workplace horror: you are Alterra property, NOA is your supervisor, and your survival is contingent on your usefulness to the mission.
Scope
Below Zero's map is smaller than SN1's. Subnautica 2's EA map is structured as regions containing biomes containing sub-biomes, with more biomes planned across the EA period. At final 1.0 it's expected to surpass Below Zero in scope and likely match or exceed SN1's finished state.
Which to play first?
If you've played SN1 and liked it: Below Zero is the natural next step — it's a complete, smaller, character-driven follow-up on the same planet. Then SN2 for the co-op leap.
If you bounced off Below Zero's land sections: SN2 is pure underwater, no Arctic surface gameplay.
If you want multiplayer: SN2 is the only option.
If you want a complete story now: Below Zero is 1.0; SN2 is EA with the arc still in development.
Related pages
Last updated: 2026-05-25.