Space Chase 1 (PC)
To get 99 shots, and 255 bars of energy, load up the game, and start a new game. Save your game in the top slot of the save game menu before quitting the game. Now load up a hex editor, and open the file SAVEFILE.100. Now goto offset B31A, and change the data there to FF63. Save, and exit, and when you re-enter the game, the cheat should be active. This process can be repeated when ever you get low on either shots or energy.