Subnautica is one of the most unique and weirdly terrifying games I've ever played. You crash-land on this alien ocean planet, and it's up to you to survive, explore, and maybe even find a way off. Building underwater bases and vehicles is awesome, but the real magic is exploring the deep. It gets seriously creepy down there, and the first time a giant sea monster pops out of the darkness, your heart will stop. It's beautiful, intense, and not for the faint of heart!