It's hard to explain the Divine Comedy to someone who never read it, because it's an enormously involved tale, but, here's the short version:
Dante's Inferno is a political Allegory following Dante himself... a fucking poet, as he strolls through the levels of hell making observations about the nature of religion and existence. The creatures he sees are nothing but metaphors for these observations. Beatrice, in the Divine Comedy, was nothing but his guide in the final part of the Comedy, Paradiso. Dante was certainly NOT a warrior, nor was he battling through hell and killing the Grim Reaper. For christ's sake Dante faints when they first cross the lake into the first level of hell.
The plot of Dante being some soldier who cheated on Beatrice and is chasing her soul into hell is pretty ridiculous, and there is no reason to turn a poem into a bloody action game. Hell they could have easily made an adventure game and actually kept the plot in tact and it would have been much better. What they did make was just a REALLY bad excuse to clone God of War.