Roblox Corporation was founded by David Baszucki and Erik Cassel. Baszucki had previously founded Knowledge Revolution, an educational software company, in 1989. That year, through the company, he and Cassel developed Interactive Physics, a 2D physics simulation.

Roblox started as a simulated 2D physics laboratory game called Interactive Physics. As the game evolved, the name GoBlocks took hold in 2003. In 2004, founders Erik Cassell and David Baszuck launched the beta version of Roblox under the name DynaBlocks.