Grow a Garden, created by a 16-year-old in a few days, has shattered records for the most concurrent players of any game in history, beating out video games that take years and millions of dollars to develop.

Amidst the delay of Grand Theft Auto VI, a Roblox gardening game, 'Grow a Garden,' has become a global sensation. Created by a 16-year-old, it boasts over 21 million concurrent players, surpassing Fortnite's record.

Roblox raised its annual bookings forecast on Thursday and topped 100 million in daily active users thanks to the viral success of farm simulation title "Grow a Garden", sending shares of the videogame platform rising more than 16%.