Subnautica 2 Frequently Asked Questions Answered

2026-06-09·FAQ

Key Takeaways

  • Copper shortage? Reefback barnacles and limestone outcrops in Grassy Plateaus are your best sources.
  • Seamoth is the best vehicle for 80% of the game. Prawn for deep mining, Cyclops for moving base.
  • The scanner room is criminally underrated — it finds resources within 300m. Build one early.
  • Disease (Kharaa) story beats are triggered by radio messages. If stuck, sleep in a bed to advance time.

Resource FAQ

Q: Where do I find Copper? A: Limestone outcrops (everywhere, 50% drop), Reefback barnacles (Grassy Plateaus, guaranteed), large resource deposits (need Prawn drill arm). Copper is the most commonly bottlenecked resource — farm Reefbacks.

Q: Where's Magnetite? A: Mountain biome thermal vents (safest), Jellyshroom Cave (dangerous), or deep thermal vents below 300m. Need at least 5 for essential upgrades.

Q: How to get Aerogel? A: Gel Sack (found in deep caves) + Ruby (thermal vents). Find one Gel Sack, knife it for spores, grow more in outdoor planter. Infinite Aerogel.

Vehicle FAQ

Q: Seamoth vs Prawn vs Cyclops? A: Seamoth for exploration (fast, mobile, depth to 900m). Prawn for mining large deposits (drill arm) and deepest zones. Cyclops for mobile base operations. Use all three — Seamoth 80% of the time, Prawn for deep mining runs, Cyclops as mobile staging base.

Q: How to recharge vehicles? A: Moonpool (best, auto-charges docked vehicle), Power Cell Charger in base (swap cells), or Cyclops thermal reactor module (recharges from heat). Never let Seamoth or Prawn go below 20% power far from base.

Q: Depth module upgrade path? A: Seamoth MK1 (300m) → MK2 (500m) → MK3 (900m). Prawn MK1 (700m) → MK2 (1100m) → MK3 (1700m, reaches everywhere). Cyclops MK1 (500m) → MK2 (900m) → MK3 (1700m).

Survival FAQ

Q: Best food source? A: Marblemelons (grow indoors, 14 food 12 water per melon). 4 plants in a pot feed you forever. Second best: Lantern Fruit (grows on indoor tree, zero maintenance).

Q: How to get water? A: Bladderfish → Filtered Water in Fabricator (early game). Water Filtration Machine (mid game, needs base power). Marblemelons give water too.

Q: What killed me? A: Probably drowning (80% of deaths). Second most common: Reaper Leviathan (Crash Zone/Mountains/Dunes). Third: Crashfish in caves (explosive, 60 damage). Carry a Seaglide to outrun most threats.

Exploration FAQ

Q: Where is the Lost River? A: Entrances at: Blood Kelp Trench (west), Deep Grand Reef (southwest), Northern Blood Kelp Zone (north). Bring Seamoth MK3 or Prawn MK1. Lost River leads to Inactive Lava Zone and the final areas.

Q: Stuck in story progression? A: Check your radio. Check Codes & Clues in PDA. Explore Degasi bases (floating island, Jellyshroom Cave, Deep Grand Reef). Sleep 24 hours to trigger new radio messages. If truly stuck, the next story trigger is always deeper.

Q: What's at the Void edge? A: Death. Ghost Leviathans that will destroy you in seconds. The map is 2km x 2km. Beyond that is the Void. There are no resources, no caves, no story content. Just Leviathans and crushing depth.