For making a building type A, you need resource B, which requires making building type C in order to refine this resource B, which requires resource D, which requires making building type E, etc. etc. All while the game is very focused on your 1 unit, so it's not a real RTS game anyway where you have proper overview and have a less stressful time building stuff, because your unit needs to travel, and get's stuck in many places (because the landscape isn't that friendly for building because of rocks and objetcs everywhere). Wish they would have simplified the stuff I mentioned above. Apart from that, it's and interesting and hectic and fun game.