Issue 24 (stylized as i24) was the last publicly accessible version of the game before it was shut down. i24 was deployed on the test server, but had not yet been released to live servers.
Useful Future Links?
Issue 25 (stylized as i25) was extended from an i24 base by SCoRE (Secret Cabal of Reverse Engineers) over the course of six years. It included additional content for i24 power sets, added the P2W Vendor, and fixed a good number of bugs.
Client Setup Guide
Server Setup Guide
Commonly Ask Questions/Problems
i25 Patch Notes
Quality of Life