If you are looking to experience the look and feel of the 2004 alpha, the community has created several simulations and remakes: DynaBlocks 2004 Experience : A recreation available on the official Roblox site that simulates the 2004 UI and physics. DynaBlocks Basics : A nostalgic mod and standalone project on that takes place in a 2004-style environment. Video Archives
If you are looking for early Roblox client files or a way to play them, you should check these community resources: Internet Archive (Wayback Machine): roblox 2004 client install
In the last two years, a controversy has erupted in the Roblox archival community. A user known as "Archive_RBX" uploaded a file to a private Discord server labeled Roblox_2004_Full_Install.exe . It was 45 MB—instantly suspicious (45x too large). If you are looking to experience the look