Yes, besides the "regular" game at 19.99, there are the "Praetor" edition at $100 and the Proconsul at $250.
They give some bonus (like free access to future DLCs, a signed DVD, an extra copy in DVD in the Proconsul, etc.), but they exist mainly to serve as a way of special (and rich
) fans to express their support of Ageod. Complete info at the Ageod shop.
Below the link to the current list of those benefactors