I thought that too, but if you google the official site, you will find
one for memento mori and another one for bloodymare.
anyway, i`m gonna try the memento-mori one, since i find out that is the same game, but they changed the name.
I still don't know if there are more than 1 official publishers, but i'm goint to try the memento mori version because is in mmohut reviews