Tethical is a tactical RPG engine with online gaming support. If you don't know what is a tactical RPG, take a look at Final Fantasy Tactics or Disgaea. See the homepage at (http://tethical.kivutar.me).
Add the following PPA to your sources.list:
deb http://ppa.launchpad.net/panda3d/ppa/ubuntu maverick main
Install the dependancies
sudo aptitude install panda3d
Get the source code
git clone firstname.lastname@example.org:Kivutar/tethical.git
Launch the server
cd server python main.py
Launch the client
cd client python main.py
Natty users should launch the client using python2.6
Get the panda3d runtime for your OS and install it.
Download the game client and launch it.
in the actual state of the developpement, the server may be offline due to bugs or security issues, find me on the support channel (Kivutar @ #ffh on irc.esper.net) to get the server running.