The beta version of Roblox was created by co-founders David Baszucki and Erik Cassel in 2004 under the name DynaBlocks.

In the late 1980s, Baszucki, together with his brother Greg Baszucki, founded the company Knowledge Revolution and developed and distributed a simulation called "Interactive Physics", which was designed as an educational supplement that would allow the creation of 2D physics experiments.