This final Critters movie changes a lot of what has been the formula for the three first. Where 1, 2 and 3 relied on humour and gore with the occasional scare, this last movie instead goes for a dark and for the most part serious mood. It rips off the original Alien, which kind of works at times, but the silly presence of the crites ruins the otherwise gloomy feeling. The film had been better by sticking to one atmosphere, and not both.