To me, great in its level design philosophy of Famicom action-platformers, specifically Castlevania. It's about trial and error, every time you die you make it slightly further the next time.

Like, it's not hard, you've just got learn how to beat it by failing, which is great. Despite only dying to two or three of them, the bosses were all insanely interesting.

I don't mind the online elements, though with the servers shut down it makes it impossible to get the intended experience years later which is shit. Luckily, thanks to fans, I was able to play this online on an emulator with a DS3, so it's still doable, but games should be designed with the future in mind. (Is it playable? Sure, is one of its key features completely gone? Yes)

I've really gotta play Dark Souls at some point.