The Seatruck is a brilliant bit of design. With all modules attached, it functions more like Subnautica's Cyclops, a mobile base that you can tow around and detach from at any point. But it's capable of towing different modules that serve various functions, such as fabrication, storage, and an aquarium that sucks up smaller fish as you travel. By default, the Seatruck is a small and nippy submersible reminiscent of Subnautica's Seamoth. The poster-child for Below Zero's added interactivity is the Seatruck, the sequel's primary new vehicle. As for crafting, new tools like the Mineral Detector help you locate specific resource more precisely, while many returning objects have rejigged crafting recipes that force you to think anew about your approach to the game. New base components like the Control Room help you customise your base in more detail, and even let you divert power to different parts of your base. General systems like crafting and base-building are broadly similar to Subnautica, but there are more objects to build and make.

Greater interactive nuance is a theme that runs throughout Below Zero. But the guaranteed fan-favourite is the Sea Monkey, a cheeky anthropomorphic critter whose behaviour ranges from mild nuisance to actively helping you out in small ways. These can be inhaled provided you avoid the wrasse-like brinefish, who follow Hole-fish around and can freeze you with a blast of ice-cold saltwater. Between the edible small-fry and the terrifying Leviathan-class beasts are more eclectic creatures like the Titan Hole-fish, which traps potentially life-saving air-bubbles in its doughnut-shaped body. As with its biomes, Below Zero's plant and animal life is almost entirely new, but it's also more nuanced in terms of how you can interact with them. That said, Below Zero remains better where it's wetter. It's a big improvement over Subnautica's limited land exploration.

(Image credit: Unknown Worlds Entertainment)

Subnautica below zero seatruck