

| Unknown Worlds Entertainment The Failed Experiment and the Leviathan's Eggs The Precursors landed on Planet 4546B and built numerous structures to research and cure the Kharaa. The Precursors trapped a female Emperor in a building called the Primary Containment Facility, and stole seven of her eggs for experimentation, hoping to extract this precious enzyme. The largest lifeform on that world, a huge telepathic species called the Sea Emperor Leviathans, produced a chemical called Enzyme 42 that effectively made them immune to the deadly Kharaa. The Precursors eventually struck gold when researching an ocean world we'd come to know as Planet 4546B. Planet 4546B and the Sea Emperor Leviathan

Desperate for a cure, the Precursors spread across the galaxy, researching different life forms in the hope of finding some basis for a cure or vaccine. Roughly a thousand years ago, an alien species called the Precursors were exploring various worlds when they contracted a bacterial disease called Kharaa which caused them to sicken and die. Consequently, the major players are never even seen or heard from, even though they set so much in motion. Most of Subnautica's plot actually happens before you get there, a background mystery that reveals itself as you explore and interact with its wide, weird world. Meeting the Emperor and Discovering the Truth.The Dragon Attack and the Release of the Kharaa.The Failed Experiment and the Leviathan's Eggs.

Planet 4546B and the Sea Emperor Leviathan.
