There are only two things that you need to know about this movie.
1. It is a Uwe Boll film. Uwe Boll is universally recognized as one of the worst hacks in film history having created such great hits as House of the Dead
, and Alone In The Dark
. He buys the rights to recognizable games and then makes a movie which is really a generic combination of the best scenes from other movies thrown randomly together. Although his films rarely even make their money back he took advantage of a German tax loophole (since closed) which allowed you to get tax credits for your film whether it makes a profit or not.
2. The clever goblin strategy is to light themselves on fire and then catapult themselves at the enemy.
If either of those things sound attractive to you then this is a movie to check out. I love the sheer irrationality and unintentional humor of a good Boll film. This film represents his largest-scale production since the film he's choosing to rip off is the Lord of the Rings, complete with an irrelevant Helm's Deep raining fight sequence ripoff that has nothing to do with any of the main characters and doesn't affect the plot in any way. His villain is the grossly miscast Ray Liotta who has gone down a long way since Goodfellas. His every scene is comic gold since he is actually trying to overact and failing. So check out this film if that's your thing. If you only like films that have such overrated features as 'quality', 'originality' or 'plot' then check out some other film.