Found this neat mod while looking for a widescreen fix for: Oni: Anniversary Edition. It provides fixes for the original game and nice inteface for downloading and installing mods. There's lots of great stuff, from re-textures to new combat scenarios.
Granted I have a lot of nostalgia for this game but it's still great fun, the melee combat is surprisingly deep. It does show its age in some spots, e.g. no manual saving coupled with checkpoints that are spaced way too far apart. The enemies wielding ranged weapons also have a tendency to gang up on you.
Also, some of the dialogue is hilarious. Enter the deadly brain!