That "ancient Rome" seems an awful lot like ancient Greece, what with a bunch of Greek deities and mythological creatures running around and Mount Olympus being there. I'd expect this level of research failure from Irate Gamer's reviews, not AVGN videos.
Or maybe the game developers thought Rome and Greece were the same thing. Hell, I bet Davey does, I don't think he's learning much of anything at school because he apparently keeps falling asleep 26 times a day. Guy's got some problems.