Subnautica 2 sells two million copies in less than 24 hours

As soon as Subnautica 2 was revealed to have four-player co-op, I immediately knew Unknown Worlds' sub-aquatic sequel would sell like hotcakes. A series with this much of a cult following was always primed to bang, and it's even more tempting if you can play it with pals. Well, unsurprisingly, it's done just that, with the developer announcing that it has already racked up two million sales just 12 hours after launch.