Guardians of Order did a hardback Slayers RPG. Its d20. Meaning based on 3rd edition Dungeons and Dragons. It covers the original three anime shows, so it doesn't cover the movies with Naga, and its from a few years back so no Premium or Revolution/Evolution-r. Worth a look if you guys can find a copy. Good as a sourcebook even if you don't want to use it to game.

It doesn't cover the novels or the comics.

is this a video game ?

oops, put that in wrong section. It's a pen and paper RPG

It's fairly easy to find a torrent for the book. Being a d20 system basically means you have various classes, skills and feats and most of the time you roll a d20, add a modifier and compare that with a target to determine success. It's generally a pen and paper system with a group of friends sitting about a table together. I think oblivion the computer game is somewhat based on it. (More easily understood by playing it) But dungeons and dragons is really classic The book is quite good as a source for information about some things regarding Slayers; I've used a bit of it for coming up with my character although they don't have all that much on dragons.

Could you post a link for the book please? I can't find it

You'll need a torrent client like mew torrent or something
the link is http://thepiratebay.org/torrent/4853641/Guardians_of_Order_s_Slayers_D20_System_RPG
let me know if it's no good

Looks like it works. Now we'll have to wait. Thank you!