Press Start while playing. Go to the "Enter Password" screen and enter these passwords:
|TSGDDYTD||Invincibility and 255 damage weak against magic|
|GLTTRNG||Tons 'o resources|
|MKTS||Fast building and upgrade|
|NVRWNNR||No one wins (play on and on...)|
Thanks to Revolution reader Tookus Squeezer!