They give impossible secondary challenges, with cheat codes I don't think anyone could get every secondary challenge.
I hate how they try to make a lengthy, it just makes me disregard the rest of the game. I played until it said fight the last of the ninja clan. I beat them YET the game does not end. It bored me after that. Fighting some invisible sniper guy wasn't too fun either.....RENT only.
I won't lie; this game was F-U-N!!! I personally liked the combo links and chains you can perform. I couldn't put this game down! but then.....all of a sudden, IT WAS OVER!!! I seriously beat this in only ONE day!! and trust me, I'm not bragging, I'm very disappointed!! :( I was hoping I could make this game last about a week or so, but before I realized it, I was all done, and left flabbergasted, and wondering what the heck just happened.
Anyway, I would definitely recommend renting this game just to have some sweet claw-n-slash action for a day or two, then send it back and get something WORTH YOUR TIME.