Alien Bases

Precursor Bases are in-development structures found in many different biomes. They we

Trivia

 * On a Trello card, the Quarantine Enforcement Platform was referred to as the Precursor G.U.N, or "Precursor Global Defense System". This is a developer joke as "guns are not allowed in Subnautica", yet the model's name is 'Precursor Gun'.
 * Models for the Quarantine Enforcement Platform and various parts of bases were accidentally revealed during an experimental patch that added them into the entity gallery. A user on the forums revealed screenshots of the bases and they spread quickly. After seeing this, the developers quickly removed them and asked pictures of them to be prevented from spreading; they called it "a huge screw up".
 * Precursor Teleporters will be present in each major biome and at important locations - they will all link to the Primary Containment Facility.
 * The Primary Containment Facility is not accsessible at this time.