Gameplay
The game perspective is third-person. There are numerous items to help the ninja on his/her mission, but unlockable items can be acquired if the player gets a "Grand Master" rating at the end of the level by being as stealthy as possible. Items and controls vary from game to game, but the gameplay is essentially the same throughout with the exception of Tenchu: Shadow Assassins. Stealth is a very important element in the game, where players have to duck, crouch, and hide behind walls to avoid detection. Enemies can be killed with one manoeuvre by using Stealth Kills, and a player can avoid detection by using the Ki meter. The larger the number, the closer the player's position to an enemy. If a player is spotted, the Ki meter will turn red, the enemy will alert everyone in the area, and the player is forced to fight hand-to-hand or hide somewhere until the enemies give up their search and resume their patrol routes (similar to Metal Gear Solid's "Soliton Radar").
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