Oni is a third person action-adventure game for PC, Mac and PlayStation 2. The game features intense action and furious gunplay.
This is the second trailer. The first trailer, from 1998, was all-CG, so this was the first time anyone got to see what the combat would look like. There are still some interesting differences between this footage and the final release, most notably the presence of blood, the Iron Demon (RIP), and various graphical details that would eventually be removed.