Euclid04 is a 2004 roblox recreation, and also a passion project, using G3D 6.10 (it originally used G3D 3.x, but no archives of that have been found yet.) and SDL.dll.
So far the assets and info have been collected for the client itself, which you can get the assets here.
Alongside that, the coding is planned to be accurate to 2004, using the old model XML files. (idea is now scrapped)
Unfortunately, it is still in WIP, so you still cannot get it yet. Once its out, you can get it in ordinary2.neocities.org/download.
Heres a picture of what it could look like. (the image comes from the 2005 roblox patent)