Despite a non-SW storyline and a deathly low-scale campaign mode, this game was shocking success!
The game is set in the clone wars, you start off in your containment tube as a baby clone and see a number of first person cutscenes which basically explain that you're a special clone trooper. Then you're thrown straight into the clone wars (the first thing you actually see on Geonosis is another clone getting eaten). You're tasked with finding your squad, then the game gets interesting. The squad based engine is pretty revolutionary but at times get a little messy, at one point I felt i was wrestling against the controls just to get a member of the squad on the sniper position.
There are a few relations to the movies but they have to be looked out for, such as seeing Count Dooku's ship escape from Geonosis (there are more, but you have to earn them!)
As i said, the campaign is horribly small-scale. The game is set into three chapters which in turn have 5 or 6 segments each. You'll go through this game in about 10-15 hours depending on your skill and learning curve. The three chapters are Geonosis, a republic vessel (huge one) which has been taken over) and Kashyyk (Wookiee homeland). There isn't much to either of them. Geonosis is either desert of machinery, Vessel is either vessel or vessel and Kashyyk is forest of treehouses.
Another slightly horrible thing is the difficulty. Skilled gamers will still struggle on this game, at times it gets a little frustrating where it's just wave after wave of droids/Trandoshan/Insect being thrown at you.
Overall, it's a great shooter, not perfect, but what game is? I'd advise any hardcore SW fan to buy it, and if you're not, it's at least worth a rental!