Too Long; Didn't Read
'Ready Player One' is set in a virtual world called ‘The Oasis’ full of highly diverse experiences ranging from competitive shooting to racing. The Oasis has its own Zero-G disco, casinos and even libraries for players to make use of. Roblox is designed as a host for user-generated content with the vast majority of the game’s content being made by players for other players to enjoy. The closest analogue for this, in my experience, is Limsa Lominsa in Final Fantasy XIV.