The Quake 3 Source Code got released on the weekend. You have to love John Carmack for his code gifts over the years. That’s 5 game engines he’s Open Sourced under the GPL now. Bloody fantastic.
Perhaps if I can find the time I will investigate it further. Perhaps try some simple little hacks to alter the game behaviour.
I have this crazy idea of trying to integrate ODE into the engine but that is probably outside of my abilities just at the moment.