Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "difficulty.txt" file in the "/breed/run/scripts" folder. Change the value for "Damage0" to "0.0" for easy mode. The Damage0 values in lines two and three are for medium and hard modes. Change those values to "0.0" for unlimited health in those difficulty settings.