Well, I've beaten Black Matrix 00, was alright. It's long and fully voiced. Decided on a whim to skim through a playthrough of original Zero on Saturn, and it's a totally different game. Same characters but different story. Stages from the original are included in 00 as skirmishes. Also I couldn't find all five endings on YT, so overall I watched 4 out of 5. Maybe the NG+ only ending one was among these, maybe not.