Subnautica memes are rooted in the unique blend of wonder and absolute terror found in the underwater survival game by Unknown Worlds Entertainment. The most famous iterations focus on the player's traumatic experiences with the Reaper Leviathan and the chillingly calm voice of the survival PDA. Phrases like 'Multiple leviathan class lifeforms detected' and the urgent 'Oxygen' warning have become iconic shorthand for impending disaster in the gaming community. These memes perfectly capture the thalassophobic anxiety of exploring the deep ocean, where a peaceful scavenging trip can turn into a high-speed chase with a prehistoric sea monster in a matter of seconds.