Subnautica is a adventure, indie game developed by Unknown Worlds Entertainment. Released in 2018, this title has become a must-play for fans of the genre. Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive. Subnautica is an underwater adventure game set on an alien ocean planet. A massive, open world full of wonder and peril awaits you! Dive Into a Vast Underwater World You have crash-landed on an alien ocean world, and the only way to go is down. Subnautica's oceans range from sun drenched shallow coral reefs to treacherous deep-sea trenches, lava fields, and bio-luminescent underwater rivers. Manage your oxygen supply as you explore kelp forests, plateaus, reefs, and winding cave systems. With a Metacritic score of 87, Subnautica has received critical acclaim from both players and reviewers alike.