While playing a Dreamcast disc on a device that reads CD files usually produces a warning message, Seaman, Shenmue, and Skies of Arcadia each have unique warning messages on each disc, all provided by the game's voice cast. On Seaman's disc, the voice actor for the Seamen will jokingly warn the player that attempting to play track one will infect their household appliances with viral diseases, and the Skies of Arcadia cast informs the player that they can't save the world while stuck in a CD player. All three Shenmue messages feature different characters from the game warning the player that attempting to play track one (which contains game data) would produce harmful results.