A short OAV from Kôichi Ôhata, the director behind Genocyber. If you're familiar with Japanese sci-fi/horror anime, then I'm sure the name Genocyber rings a bell. It's a somewhat mythical 90s anime that only cares about being as badass as possible. Cybernetics Guardian is quite similar, but more compact (and a little older).
While nothing too original, the mishmash of influences does give this film its own, unique identity. The dystopian, futuristic setting, the mecha and pseudoscience mixed with a bit of demonology and the raw action are nothing new, but thrown together it makes for a pretty explosive combination.
Because of the limited runtime Ôhata doesn't have much time to do proper world building, at the same time the no frills approach and extreme pacing add to the charm of this production. The animation is limited, but the designs are pretty cool and if you like excessive violence there's plenty of that here. Short and entertaining.