Developer: Bungie West
Release Date: 29 January 2001

The last game Bungie made before being absorbed by Microsoft and consumed with Halo, Oni is that game I barely remember but folks on my Discord desperately love. It's also never been released on digital distribution services, has been out of print for ages, and was the only product of the Bungie West offshoot.

Still, it is the subject of multiple reverse engineering attempts, the latest of which recreates the game for Apple Silicon.
In the anime-style game you play as a female protagonist aligned with the police force but learns that elements of her past are being hid from her, causing a quest of self-discovery.