59		Layers of Fear (PlayStation 4, 2016)
45		Wraith (PlayStation 4, 2018)
44		The Long Dark (PlayStation 4, 2017)
44		Syndrome (PlayStation 4, 2017)
44		Alien: Isolation (PlayStation 4, 2014)
41		Alien: Isolation (PlayStation 3, 2014)
40		Galerians: Ash (PlayStation 2, 2003)
40		OverBlood (PlayStation, 1997)

Notes: Games similar to Subnautica, Games like Subnautica, Unknown Worlds Entertainment, Inc., Unknown Worlds Entertainment, Inc., PlayStation 4, Action, Sci-Fi, Futuristic, Survival Horror, Survival, Real-Time, 1st-person, Unity, Aquatic, Underwater, Submarine, Sony PlayStation, PSX, PS1, PS2, PS3, PS4, Game Similarities.