It’s unique in that practically everything on ROBLOX is designed and constructed by members of the community. ROBLOX is designed for 8 to 18 year old, but it is open to people of all ages.

Roblox Corp. Chief Executive David Baszucki won the loyalty of tens of millions of videogamers with a do-it-yourself approach to play that defies the industry’s typical formula for success. Now ...