Version 1.1 of Syntensity. Syntensity is an open source platform for 3D multiplayer games that lets everybody both play and mod everything. In other words, you can mod any of the games on Syntensity, and play the new version with other people.
Sorry this isn't a fully automated installer yet. You might need to install the Microsoft VC++ redistributables, links to them are here. Otherwise, just unzip it and run intensity_client.bat.
I seem to have messed up the link for the instructions. Anyhow, to run this you might need the Microsoft VC++ redistributables,
Microsoft.com
and
Microsoft.com
Again, sorry the installer isn't fully automated yet.