There's two ways of looking at "Blood Frenzy": A very standard, run-of-the-mill slasher flick that tries to cash in on the success of the first two "The Hills Have Eyes" films, simply by using the same desert setting and a similar stack & slash routine. Or: A modest, unrighteously overlooked 80's slasher gem that sticks to the point and uses the at the time not-done-to-death-yet setting of a desolate desert to its advantage. Since it also specializes in nasty throat & stomach slicings, uses very distinguishable characters and even contains a very basic, but to-the-point twist at the end... I'm in the second camp. All-in-all, not a bad slasher movie from the 80's, although it's an obscure one and you first must have seen a lot of those to be able to acknowledge this.