Confidential Mission Cheat Codes for Dreamcast

Sega lightguns
Successfully complete all training levels in Agent Academy mode to unlock Sega lightguns for your character to use in the regular missions.

Additional training levels:
Successfully complete Another World mode to unlock more training levels in Agent Academy mode.

Gold guns:
Successfully complete Agent Academy missions one through eighteen.

Level select:
Successfully complete the game under the easy difficulty setting with the good ending.

Another World option:
Successfully complete all training mode sections.