What was the original name of Roblox during its beta testing phase?

The original name of Roblox during its beta testing phase was DynaBlocks. The platform began as an early physics-based building and social experience before adopting the Roblox name.

Development traces back to David Baszucki and Erik Cassel, who had previously worked on educational physics software. Early prototypes reportedly passed through the working names eBlocks and GoBlocks before the project was known as DynaBlocks. The name reflected the project’s emphasis on dynamic, block-based construction.

The name was changed to Roblox in 2005. The word combines ideas associated with robots and blocks, matching the platform’s programmable, building-centered identity. Roblox was then formally released on September 1, 2006, after its earlier testing period.

Builders Club was a membership program introduced later, not an original title for the platform. Minecraft and Blockland are separate games, so neither belongs in Roblox’s development history. Players may also see DynaBlocks described as an early working title rather than a conventional retail product name.