Every decision you make, every click you press, and even where you are centered on the map at any given moment can cost you in the fast paced world of StarCraft 2. Your actions have costs and consequences far beyond the minerals and Vespene gas associated with them, and those costs are emphasized far more in the sequel than they were before. We go over some of the most important ones to keep in mind as you adjust on the fly in the heat of battle, so think about the costs of reading this guide as you browse it!