60		Layers of Fear (Xbox One, 2016)
54		DayZ (Xbox One, 2018)
45		Syndrome (Xbox One, 2017)
43		The Long Dark (Xbox One, 2015)
43		Alien: Isolation (Xbox One, 2014)
42		Alien: Isolation (Xbox 360, 2014)
40		Dino Crisis 3 (Xbox, 2003)

Notes: Games similar to Subnautica, Games like Subnautica, Unknown Worlds Entertainment, Inc., Unknown Worlds Entertainment, Inc., Xbox One, Action, Sci-Fi, Futuristic, Survival Horror, Survival, Real-Time, 1st-person, Unity, Aquatic, Underwater, Submarine, Microsoft Xbox, Game Similarities.