Subnautica Subnautica is an underwater, open-world adventure game set on an alien ocean planet. It is currently available on Steam: http://store.steampowered.com/app/264710/ Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines, terraform voxel terrain, and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - All while trying to survive. Users who are followed by Subnautica obraxis Charlie Cleveland Charlie Cleveland Sim Mix Simon Chylinski