Roblox, stylized as RŌBLOX, is a semi-free online brick-building MMORPG (Massively Multiplayer online role-playing game). It was originally titled "DynaBlox" when it was first published but was changed quickly. It entered multiplayer alpha in 2006 and was released in full to the public later that year.res looking too much like Lego and Roblox was afraid Lego would file a lawsuit. There is a blog that shows the designs, and the mesh.