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 a 2006 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