Throne of the Lizard Emperor!

From publisher burb: A group of explorers sets out to a remote mountaintop deep in the Andes, somewhere in eastern Peru. There, driven by their own motivations they encounter a German science outpost, a lost scientist and hordes of crazed monsters all amongst the ruins of an ancient Inca city. What are the Germans up to and can the result of their horrible experimentations be stopped before mankind is made to suffer?