Well, for now there are ways of cheating if you compile the game from source in "debug" mode (not the same as downloading an official release from Sourceforge) - Once a copy of the game is built this way you can open up the console when running it and use the testing debug commands to win a battle, give yourself items or money, etc.
The other way is to simply unzip the pk3 files and edit the script files to manipulate things, with some work the game balance can be altered quite a bit (or thrown far off balance) quite easily.