Girls with Guns
Time-Traveller
Mermaid Forest
Last of the Rumic World OVAs and one I hadn't seen before, I liked Mermaid Forest, another reasonably effective 'horror' anime.
Oh wow, I really need to re-watch that series sometime, it's been a while, and I thought it was very good. Do you have that on DVD or did you stream that from somewhere? I have the Geneon DVD box set: