They've posted up the .pdf of the rulebook online so you can see how the game works and know what you're getting in to.
(above link leads to their main webpage. Photo link leads to the .pdf. Just so you know)
From the announcement:
This Friday, February 8th, at 2pm GMT, we will be launching the Rogue Trooper Kickstarter.
You can download a first draft of the rulebook from here to get a good idea of the first few units that will be appearing and how the game plays;
Hope to see you there on Friday!