Rainbow Six: Rogue Spear

Hold L + A + B + Y + X then press Down. Cheat mode allows you and your team to become invisible, have God mode, big head, mega head, and more. Use the D-pad to bring up the various cheat options.

Start the Dreamcast without the game disc. Go to "Music" at the main menu then insert your game disc. The first track is data and the Dreamcast will skip it. The second track is a "Warning this disk is for use only on the Sega Dreamcast" statement. It will then skip to tracks three and track four. Tracks thirty three are music and thirty four to ninety seven are voices and speech.