Set in 835 AD we meet a Saxon peasant called Wade. He gets captured by some Vikings and both he and his brother get carted off to the Vikings den, which are some tents and twigs on the side of a hill. There they are chosen to take part in a Viking ritual that involves the use of sacrificial human hearts. This is done by some sort of Priestess witch who has a fetish for heavy use of mascara.
This ritual is done by releasing the victims and hunting them down (like in 'The Naked Prey'). Cue a lot of one on one scrapping, some blood letting, minimal dialogue and some brilliant examples of prosthetic bad dentistry. The Berserker bit comes from when the Viking lot take some sort of drug and go 'berserk' - which is actually where we get the name from. It was more commonly used for battles where you could use an amphetamine rush in order to take on the enemy - but hey a human sacrifice chase will do too I suppose.
Now this is a small budget and it shows. However, there are some pretty good performances, the music is also really very accomplished and the continuity guy did an exceptional job. They also make the most out of what they have got to work with and it has a genuine feeling of plausibility. However, I was still unengaged at times and got a bit bored with the constant brawling and lack of anything meaningful to engage my cerebral cortex. If you like Viking films you may want to see this even if they don't have pointy horned helmets.