Avalon Code (アヴァロンコード, Avaron Kodo) is a fantasy-action-role-playing video game for Nintendo DS. It was developed by Matrix Software and published by Marvelous Entertainment.The game makes use of a 'mechanic' that allows the player to affect the "elemental code" of the world around them by using the Book of Prophecy which is situated on the touch-sensitive lower screen. This book is the central focus of both the plot and gameplay.