Outer space is what currently holds the global population’s active imagination. The big breakthroughs in science that wow us are made up there, and so our popular stories follow suit—whether it’s space disasters directed by Hollywood (Gravity, Interstellar, The Martian) or videogames that promise us the universe (No Man’s Sky, Stellaris, Elite: Dangerous). Popular culture’s current output sells the idea that we are infatuated with life and death beyond our home planet. But Leo Dassey, creative director at Arachnid Games, hasn’t turned his head to the skies; he’s looking the other way. His team’s upcoming game Diluvion is an undersea adventure…