Easter Eggs

Easter Eggs are hidden references to other games or pop culture.

Natural Selection 2
The Natural Selection 2 Poster can be found inside the Wreck in the Grassy Plateaus and placed inside your Seabase. There are many other objects from NS2 in Subnautica: Trello It is a reference to another game made by Unknown Worlds.

Portal 2
The first message broadcasted from the Communications Relay, which says: '''"This is an automated bounce back from the Aurora Mining Vessel. Your distress signal has been received. An emergency relief team will be dispatched to your location. *Static* Estimated arrival time: 9...9...9...9...9 hours". The wait time is a possible reference to Portal 2, whereas the announcer says to Chell (the protagonist): "You have been in suspension for nine...nine...nine...nine...nine..."'''

Holy Diver
A fifth message is received by the player's Communications Relay later in the game. The day this message is received varies. It displays: ''You've been down too long in the midnight sea. Oh don't you see what I mean? This message is a reference to the song Holy Diver'' by the US heavy metal band DIO.

Star Trek
The line occasionally said by the PDA after activating either Data Terminal in the Precursor Array, "Resistance Is Fertile", is a spoof on the Borg from Star Trek.