Over the course of the movie, the students enter the confidence of the troll hunter, a grizzled ex-soldier, and learn the secret history of the TSS, Norway's Troll Security Service. They learn about troll baiting, troll ecology, and how the government keeps them secret and isolated. The central mystery is about unraveling why various trolls have gone on a rampage. The title of this post is a line delivered by the actual Prime Minister during a discussion on energy policy, which the film makers humorously worked into the context of the movie.
The Troll Hunter has a lot to offer as inspiration for both fantasy and horror games. First there's the central character, the iconic monster hunter. There's a literary and cinematic tradition of the hardened outsider that understands the nature of the foe, the necessary weapons and methods to hunt and destroy the beast. I'm not giving it a lot of deep thought right now, but the first two that jump to mind include Van Helsing from Dracula, or Quint the shark hunter from Jaws, with his finger nails scratching the chalkboard - "Y'all know me. Know how I earn a livin'. I'll catch this bird for you, but it ain't gonna be easy. Bad fish. Not like going down the pond chasin' bluegills and tommycods. This shark, swallow you whole."
The troll hunter roams the scenic Norwegian wilderness in a beat up truck and fifth wheel camper, loaded with ingredients to make troll musk, ultraviolet light weaponry in various configurations to blast trolls to stone, and a stereo system with external speakers to play the kind of music that drives trolls nuts, like You Have a Friend in Jesus.
The other angle I enjoyed in the movie was the scientific exploitation of myth and folklore. The movie takes certain aspects of troll folklore, assumes it's true, and then goes on to explain the "Monstercology" behind the folklore. And the troll hunter takes full advantage of the troll's vulnerabilities and weaknesses, such as having a pint of "a Christian man's blood" in a container to use as bait. The trolls can tell the difference between how believers smell and the pagans, you see.
Highly recommended; it's a low-budget sleeper with a lot of charm, and be sure to see the Norwegian original before the inevitable American remake - apparently an American film company already has the rights.
Here's the full image from the poster, showing a "Jotnar", one of the ancients, much larger than the standard trolls: