One of Capcom's finest games.
Onimusha controls exactly like Resident Evil in a sense. Both have those "survival horror" controls (pressing Up makes you run in whatever direction you are facing). However, Onimusha is an action game where you slice and dice up demons. The game is really short (can be completed in about 4-5 hours), but it is really good an fun. I love collecting the orbs and getting weapon upgrades. Plus, the story is good too.
Graphics:
Really good. The character models and backgrounds are amazing and richly detailed.
Sound:
Great music, SFX, and voice acting.
Replay:
Not much, but it is one of those games you can just pick, play, and beat in one sitting and it'll make you satisfied.
Overall:
Onimusha is a great game to own for any PS2 owner, ecspecially now that it's only like $5.