Tenchu: Dark Secret is an action-packed video game in which players take on the role of ninja assassins tasked with protecting a princess. With swords, explosive traps, and other realistic ninja weaponry at their disposal, they must complete over 40 single-player missions or challenge friends to local wireless multiplayer matches. Three unique modes and various customization options are available to keep each match interesting. The game also supports Nintendo Wi-Fi Connection which allows players to buy, sell, and trade items online with either friends or strangers.