As tens of millions of gamers log on every day to play games such as Fortnite, developers are hoping their creation will become the next megahit. Worlds Adrift has elements of Fortnite - a "bright, brash multiplayer shooter" game - combined with World of Warcraft and has been spawned by a developer already used to turning simple ideas into viral smashes. However, it's also hard to sum up in a few words, which may be why Bossa Studios recently decided that the best way to promote their game was to invite a few fans and journalists to play it while dangling from a crane 45 metres above Chelsea College of Art. The stunt made more sense that it seems. The game drops players in a massive multiplayer online world of floating islands, and tasks them with building sky ships to move from one to another, exploring new islands, constructing shelters, and sparring with other fleets for honour, profit or just a laugh. Bossa Studios previous hits include a physics-led comedy hit Surgeon Simulator, in which players are tasked with carrying out complex surgeries through a deliberately obtuse control system, and the mobile version of story-driven Thomas Was Alone about a blue rectangle that gains sentience.