I watched ten minutes of the original yesterday. The quality of the animation is something else. Story looks like a cliched "dark" Templars, Illuminati, Dan Brown, Gabriel Knight-ish ancient order weird-ass game. Hopefully I'm wrong.
Sadly, I can't find it - not even on GOG, where they're selling 2 and 3.
So I might get this instead, soon as I'm done with my current batch of games.