Iria: Zeiram The Animation, OVA 1994
And another secret 90s noscript. A peculiar blend of 80s visuals, gung ho action and high quality 90s animation.
I'd like to especially note it's very interesting and unique overall design - oriental sci-fi. Firearms and vehicles all have wooden furnishings, architecture is a mix of futuristic and traditional eastern elements.
Overall, it's an eye candy for sure, got nice soundtrack and not an overarching plot to keep you distracted from it all.