That game is Adopt Me, which lets you raise a pet. It's been the most popular game in Roblox for ages, and is now the first game in the platform's history to reach a total of 20 billion visits.

The team behind record-breaking Roblox game Adopt Me has branched out to create its own development studio, Uplift Games.

Random rewards and ‘child gambling’ Many of Roblox’s most popular games, such as Adopt Me!, Blox Fruits and Pet Simulator 99, include random reward features.