When I play Subnautica 2, I often feel as though I am swimming in two worlds simultaneously. On the one hand, there’s the world that goes on without me, the world of wonky indigenous beings living out their lives, careless of my presence: shoals of unharvestable fish swizzing past like dropped fireworks, growth cycles half-deciphered in flooded laboratories, crested hammerheads idly circling their territories. On the other, there’s the world that goes on for me, its rewards and hazards colour-coded…