The Prey(1983)

It's not human, and it's got an axe!

Three young couples set off into the mountains for a weekend of climbing, drinking and lovemaking; little do they know that they are stumbling into the terrain of a fearsome predator – a wild man, horrifically burned as a child many years ago in a fire which engulfed his gypsy camp and left only him alive, roaming the woods in search of his next human prey.