Myth

This cheat is also for PC.
WARNING! this cheat will spoil the game but if you want to then hey...

Here's the cheat:
ctrl+ instantvictory
pizzaparty (untested)makes all warriorsstronger including opponents

hold space when starting a campaign-game and you can choose among all scenarios
These cheats do not work in multiplayer.

If you have a stage that you just can't get by use this to go to any stage. It's prettysimple just hold down the SpaceBar when you choose a new game.