Demonwarp is low-budget horror/sci-fi fare, that despite its flaws does end up being a pretty memorable entry into the genre and fairly entertaining. Some of the enthusiastic reviews here, however, sound almost like the VHS box marketing hype... be aware that most of the madcap stuff doesn't happen until the final 15 minutes, and the bulk of the film is a trudging, predictable bore.
The premise for the first 70 minutes is well-worn: a group of teenagers visit an isolated cabin the in woods where a bigfoot-like beast runs amok. Poor old George Kennedy appears as a man whose daughter was taken by the beast and has avowed to seek revenge. It feels sad seeing him reduced to such roles, but whenever he appears onscreen he does bring a touch of class and elevate proceedings. The teenagers are mostly typical 80s fodder, save for Billy Jacoby who brings some pep and personality for the short time he's around. The lead protagonist is very poorly written and woodenly acted, coming across as deeply unlikable, which does sap the spirit of the action. Michelle Bauer turns up to add some scream queen appeal, being chased around the woods topless. Other meaningless characters cycle in and out as prey for the beast and things become fairly rote and dull. At this point I was complaining, "I've not seen one demon, nor anything approaching what could be considered a 'warp'". Well, my criticisms were answered...
In the last 20 minutes the director makes amends by chucking as much weird freaky sci-fi and horror stuff at the audience as he can muster, and all of this was really good fun. Transmutation, zombies, space ships, demented priests practising human sacrifice and a bizarre Davros-like space demon that genuinely looked really good. If you've been paying attention to earlier scenes a few plot points come together in a way that's quite satisfying.
This could have been a lot better with a tighter script and better editing to ensure some pace and urgency. There's a really cool and bizarre story in here that just needed some refinement to really translate to the viewer in an exciting manner; as it is, it's kind of muddled and confusing, but hey - it doesn't all need to make sense and you can just sit back and enjoy this for what it is - silly b-movie fun!