In this mission you start out with a few units and you need to make your way to your base. Take out any zerg units that you meet on the way, there will not be that many. Once you get to the base use your probes to mine some minerals and gas. have one probe build a pylon next to the unpowered gateway. build a forge and once that is completed build some Photon Cannons at the enterance to your base leaving room for your people to get in and out. build a squad of zealots and a squad of dragoons, upgrade at least two things at the forge and then attack. continue reinforceing your troops and taking out the enemy base should be an easy thing to do.