I have to admit, I did not watch the two live-action Zeiram movies. I saw a clip or two (I used one of them) and read a summary on Wikipedia. Because of this, I approached Iria: Zeiram the Animation not as a prequel to the movies, but as a distillation of elements from the movies, an anime that stands on its own. But it's not a great anime on its own, or at all, really. It's not truly awful, but there are so many other anime out there worth your time more than this one. Some of the plot beats are head scratching, to say the least.