Tenchu: shadow assassins is a unique game, and is worth playing.
Plot: You play as two ninjas who are sent on missions by the king. you have unique weapons that you must use in order to get past guards, or to kill them. For example a bamboo blow pipe that you shoot water out of to extinguish lights.
Graphics: the graphics in Tenchu are very good. They are not the best we have seen on the wii, but they are still quite good. The cut scenes between each level are very well done, and the voice acting is very good as well.
Sound: there is not much music in the game. Only when someone spots you, or someone is close to you the music will become dramatic to make you feel like you are in the game.
Game play: if you have ever played a splinter cell game, just take away guns, and secret agents and replace them with swords and ninjas. You have to be super sneaky, and think of the best way to kill the guards. It normally takes me a couple of times before i figure out what to do.
Controls: the controls in this game are solid. Running, and turning sharp corners are the only tough things to do. Other then that you just control the movement with the analog stick, select weapons with D-pad, use them with B, and attack enemies with A. You use motion controls when killing enemies like stabbing them with their own sword, or by snapping their necks.
Overall tenchu is a decent game. I don't think it is for everyone. You should buy it only if you are a fan of stealth games. But i think everyone should at least rent it, because it is worth playing