How bad is it? It's better than part 2, but it's very bad.
Should you see it? If you've made it through the first 2, I suppose you might as well.
I tend to like the Uwe Boll film's best that others hate most, so I end up watching a lot of them. This time the BloodRayne series actually gets to the time period of the video game, but that's problematic, because it trivializes the horrors of Nazi Germany (there's a sex scene in a truck on the way to a death camp, for example). Our bisexual half-vampire heroine has to team up with resistance fighters to defeat undead Nazis intent upon making Hitler immortal through vampirism. It has Michael Pare' as the villain and a rather entertaining Clint Howard as the mad scientist, but those two talk their way through most of this film. The rest of the film is simply disjointed and pointless scenes of violence and sex. The film tries not to be campy - a failing - but doesn't really offer anything but appeals to the basest of interests. [Wow, did I just get moral?]