As of August 2020, Roblox had over 164 million monthly active users, including more than half of all American children under 16. Roblox is free to play, with in-game purchases available through a virtual currency called Robux. Roblox began to grow rapidly in the second half of the 2010s, and this growth has been accelerated by the COVID-19 pandemic. For most of Roblox 's history, it was relatively small, both as a platform and as a company. Created by David Baszucki and Erik Cassel in 2004 and released in 2006, the platform hosts user-created games of multiple genres coded in the programming language Lua. Roblox ( / ˈ r oʊ b l ɒ k s/) is an online game platform and game creation system developed by Roblox Corporation that allows users to program games and play games created by other users. Game creation system, massively multiplayer online