Arrange Mode New Ending: Choose and complete the upper-path in Arrange Mode to see a new ending not found in the original game. To select the upper-path, you must always wear the gold armor when you finish a stage.
Use armor enhance weapons in your boxers: with armor go to an enemy and the second your about to get hit pause it and save. Reset the game and reload it. You will be in your boxers using your armor weapons.
