ETERNAL EYES CHEAT CODES
None.
ETERNAL EYES TIPS & TRICKS
Hidden introduction
Allow the game to remain at the opening screen when "Press Start" appears. An introduction sequence with background information about the story line will eventually start.
ETERNAL EYES UNLOCKABLES
Elena
Finish the game, then start a new game to have Elena in your party.
Ending bonuses
Finish the game. Load it again to have all new bonuses, including keeping all your puppets and everyone at their original level.