The IP Acquire had to create when they wanted to make a ninja game but sold Tenchu to From Software.

Ahead of it's time, very cool idea of 'ninja life RPG', where you choose the feudal lord you will accept works from in a time of war.

Very good gameplay, with good movement with momentum preservation, wall running and wall jumping, and very fast pace overall, as for example, you can use grappling hook without aiming and while in the air even. Can be wonky sometimes but very satisfying when mastered.

A variety of items with interesting effects, and a whole alchemy and buff/debuff system with potions and the like that you can create your own bombs/potions/bait items.

Really interesting mission editor that you could create custom mission of all sorts and play yourself or possibly have other people play them. (Not very well explored as at the time this game came out, network functions weren't that common so you had to practically have an offline circle of friends to really use this feature to it's fullest)

Cool ambience and character designs, overall amazing game that should return with a PC port re-release or a new game.