It's basically 3E/3.5 dnd, but adapted to a modern setting, the srd is
here, for most of the things not mentioned on it(such as how much xp is needed to level up) it's usually the same as 3E or 3.5.
edit; just found an odd archetype on the wiki(though as far as I can tell the cards don't actually exist for it, at least not currently, or they haven't been added to the english game yet)
The
"Cat" archetype, looks like it could at least be an unusual beast type archetype, though not a very powerful one.