Complete story recap covering both Subnautica and Subnautica: Below Zero as essential backstory context for Subnautica 2. Covers the Aurora crash, Planet 4546B, the Kharaa bacterium, the Sea Emperor Leviathan cure, Robin Ayou's investigation into her sister's death, Al-An the Architect, and the events leading into Subnautica 2.

The Architects (Precursors) are an advanced alien civilization in the Subnautica universe who built the Quarantine Enforcement Platform, Disease Research Facility, and Primary Containment Facility on Planet 4546B.

The Blight is a mysterious organism spreading across Planet Zezura in Subnautica 2, disrupting the ecological balance of the alien ocean world and serving as a central narrative threat.

The Sea Emperor Leviathan is the last of its species in the original Subnautica, a 200-meter telepathic creature over 2,600 years old, voiced by Lani Minella.

Complete guide to all biomes in Subnautica 2 on Planet Zezura. Covers dynamic weather, depth-based progression, environmental hazards, confirmed biomes (Start Zone, Kelp Forest, Coral Gardens, Sparse Plains, Jelly Plateaus, Overgrown Ruins, World Tree, VepZone, Void), biome discovery history, handcrafted design philosophy, biome-specific resources and creatures, Early Access expansion plans, cut biomes, and differences from previous Subnautica games.

Complete guide to Planet Zezura, the alien ocean world in Subnautica 2. Covers all confirmed biomes (Coral Gardens, Kelp Forest, Jelly Plateaus, World Tree, Overgrown Ruins), surface conditions, the Blight bacterium, fauna, vehicles, the Biosampler genetic modification system, and connections to Planet 4546B lore.

The World Tree is a biome on Planet Zezura in Subnautica 2, identified from development file names. The name implies a massive organic structure forming the basis of an entire underwater ecosystem.

The Jelly Plateaus is a biome on Planet Zezura in Subnautica 2 featuring flat elevated terrain with jellyfish-themed elements. Identified from development file names.

Ben Prunty is the composer for Subnautica 2, known for FTL: Faster Than Light, Into the Breach, and the previous Subnautica games.

Seth Dickinson is the Senior Narrative Designer for Subnautica 2, known for writing Destiny's Books of Sorrow, the Baru Cormorant novel series, and Exordia.

Anthony Gallegos is the Design Lead for Subnautica 2, previously a gaming journalist at IGN and co-founder of the Rebel FM podcast.

Charlie Cleveland ("Flayra") is the co-founder of Unknown Worlds Entertainment, creator of Natural Selection and Subnautica, and architect of the franchise's no-weapons philosophy.

The Tadpole is a modular one-pilot submersible in Subnautica 2 with a manta ray fin chassis design. Base crush depth of 200 meters. Featured in Dev Vlog 4.

The Wakemaker (also called Wake Makers) is Subnautica 2's first wearable underwater booster system, replacing the handheld Seaglide from previous games. Body-worn for hands-free propulsion.

The Dive Elevator is a rideable platform vehicle in Subnautica 2 for vertical transport to the ocean depths. Multiple players can ride it together, and it hauls resources back to the surface.

The P.R.A.W.N. Suit (Pressure Re-Active Waterproof Nanosuit) is a bipedal exosuit designed for extreme deep-sea operations. Featured in the original Subnautica and Below Zero.