Boppin'

From the main menu, these are available in both the shareware and registered versions of the game:

• [ctrl] [V] - gives a slide show of all episodes (while the show is playing, you can hit the left and right arrow keys to go to the previous and next levels, or esc to quit)
• [ctrl] [T] - sound testing dialogue
  
  During gameplay, the following are available in both the shareware and registered
  versions of the game:
  
  
• [ctrl] [B] - display the mystery spot
• [ctrl] [L] - moves you to the next level, at the expense of a life; will not work during the final battle
• [shift] [ctrl] [L] - moves you back a level; this will not work on either the first level of an episode, or the final battle.
  
  During gameplay, the following are available provided the password "TOYS" is
  given to activate them. These work only in the registered version:
  
  
• [ctrl] [F] - go to the final battle for the episode
• [alt] [H] - delivers one maximum hit during the final battle
• [ctrl] [F5] - add one credit to player one (nine maximum)
• [ctrl] [F8] - add one credit to player two (nine maximum)
• [1] or [!] - set lives for player one to zero *
• [2] or [@] - set lives for player two to zero *
  
  * These two cheats may not work if the shift key is used for a button.
  
  Finally, in v1.1 of Boppin, the command line parameter "blood" may be used to access the violence mode from v1.0.

• "Customer Cheat" means it's the cheat given out with the registered version of the software.
• "Debug Mode" means it's an unsupported cheat mode.
• "Tech Parameter" means it's a code that does something, but really isn't a cheat, it's more or less there to help Apogee Customer Support.
• "Misc Command Line Parameter" is the same type of thing as Tech Parameter.