Great old-skool fun! Satisfying stealth kills on [toaster-AI] enemies with well designed levels and plenty of freedom.
This is where the game is really, really fun: The actual killing. There are many reasons to kill: to get a high rating, to get a hi-score, to get more money at the end of the mission for buying clothing and abilities, and for achievements: 20 kills, 50, 100, 300, 700 and 1000 kills with an echievement for each milestone. There's also one guy on each level that wears a big straw 'Raiden' hat, if you kill him there's milestone achievements there too.
The mission objectives are usually assassination ones too, which is plenty of fun as you can now take down bossess with stealth kills, although you get more points and a higher rating for facing him head on with honour.
There are plenty of different stelath kills to perform, from the front, back and side, down from above, up from below, with bow and arrow and blowpipe, from the other side of those Japanese sliding doors (Watching for the sillhouette and sticking him with your sword, then pulling him through the door bringing it crashing down on top of him in a shower of over-the-top blood is very cool), pressing up against a wall then grabbing the guy from round the corner and pressing him against the wall pinning him with your sword is great too!
Overall, the game looks average (but well enough to play for sure), the music is alright, sound effects and ambient effects are basically nil but the stelath killing is excellent, very fun, great to replay levels to try and get the quickest time with all enemies killed. People who have never liked the series will not find anything here, but for fans it does exactly what you want it to. Nothing has changed since day one for sure, but that's not a bad thing here. Considered as a remake of the original Tenchu, you will be hard pressed to find a better game in the series.