Fans of the series will find this film to be blatantly unwatchable due to the utter lack of interest given to the source material. The shell of the monsters ripped from the game proper are plastered onto the stereotypical monsters of generic cinema in order to give you a vapid tale of an outsider that somehow trumps the natives in doing what they do best. This is set in the backdrop of a nonsensical plot built on a contrivance that ignores any inbuilt content that could have been used to give the film a semblance of a working plot. If you want the spectacle of mindless monster killing, it would satisfy your craving for something to happen on screen while you turn off your brain for an hour and a half. But if you played any of the games past the first few tutorials, you would realize not only how poorly this is translated onscreen, but that you could probably get more context for what the game is in the 2 minute cinematic introductions that the creators make for most of the games. You would have a more coherent story from that than what you get in this film. I mean this in the literal sense; you will get more from a montage of cinematics without actually playing the game than this film.
The long and short of it; not only has Paul never played the game, but he succeeded in showing how vapid he is as a director as he cannot even be bothered to watch a few short clips of the series to translate any of it on screen.