The file you will be editing is easyvar for Easy difficulty use other files for other difficulty settings It can be found in the quot25 to lifedatavarquot folder First right click the file and select properties Uncheck quotreadonlyquot and click OK Open the file with Notepad or Wordpad Locate the line that reads quotAI2PlayerDamage 014quot and change 014 to 0 Save the file Now when you play you will take no damage from AI characters