Tenchu Z is a fun ninja game, but it has some flaws.
Good: Stealth kills are awesome to watch, Ninja customization is cool with lots of options to chose from, 50 missions to keep you playing for a while, A.I. is very stupid making it easy, Music suits the game.
Bad: Story is almost not there, Stealth kills become quite repetitive, Normal fighting is clunky and not fun at all, Online co-op can be laggy most of the time, A.I. is very stupid making it easy, Graphics look like a PS2 game.
Graphics: They are by no means great but average. It does not use the 360's hardware and graphical capabilities to the max, and makes you feel as though you are not playing on a next gen system. 6/10
Gameplay: Is both bad and good. The bad part about it is that normal combat is very... very bad. The simple 3 or 4 hit combo is clunky and most of the time you will miss your target. The good part about it is how stealth kills are executed, in numerous ways. This is nice as it gives you an option to approach a situation in a number of ways. 7/10
Sound: The music to Tenchu Z fits the game perfectly, I especially enjoy listening to the opening cinematic soundtrack. The sounds of swords drawing sounds quite realistic, however when you are hit... the sound seems awful. But that is the only real complaint about the sound, and since you shouldn't be attacked anyway since this is a stealth game... I find the complaint redundant. 9/10
Story: What Story? There are some story elements inside Tenchu, but it can be quite hard to keep track of it. All I understand is that every mission I'm doing is linked to a war between another country. But at first it seems to be about drug trading?! The story is not a huge part of Tenchu Z... sadly. However a long span of 50 missions, even though they are very similar, will keep you in the ninja action for a while. 6/10
Overall Tenchu Z is a fun game, but could have been better in a number of places. I give Tenchu Z... 7.0