Hello everybody! As some of you might know, we are working on an OpenArena mod called AfterShock.
We will start a new ladder system soon and people can already begin to register for it. The first ladder will be played on CA (Elimination) 2vs2, see:
There are already 8 teams registered, ladder will be started at about 20 registered teams. The match modus will be "best of three" and the ranking calculation will be done using an elo system (http://en.wikipedia.org/wiki/Elo_rating_system).
You can find the ladder rules (not 100 % done yet), a table of the elo values and the general rules about registering here:
There is also a development thread on Evil's board, which describes the procedure of how to challenge opponents and other aspects of this ladder. Link:
Begin of the ladder will be in 1 - 2 weeks, as soon as all scripts are working without bugs (there is already a running test ladder open, testing all needed parts). If the elimination ladder works out well, we will start some other ladders as well (TDM, Duel, CTF).
If you have any questions about the ladder, the dev-thread on evil's board might be the best place for them.