After you've built a couple of Vikings to add to your starting army, add a reactor to your starport, allowing you to build out two Vikings at once. You'll need a lot of vespene to build out the Vikings. Marines, naturally, will attack anything in range.īe sure to also build out loads of SCVs and dedicate more than usual to collecting vespene gas. Unfortunately while they're grounded, Vikings will not attack air units. If you want them to attack grounded units, you have to land them on the ground (it's a command you can access when you have a Viking selected). A quick note on the Vikings: While they're airborne, they will only attack air-based units. Start quickly, training Marines, Medics and using your starport to build out Viking units. One of the Achievements challenges you to save three colonist outposts, which requires destroying the Purifier fairly quickly. As time passes, colonist outposts will be terrorized by small protoss fleets and the Purifier will slowly move between outposts and blow 'em up. The nexus stations appear on your map as markers, with one that's very close to your base to the east.

Before you can attack the Purifier, you need to destroy three protoss nexus stations spread around the map. Bonus Objective | Stop the third terror fleetīefore we start, the gist: A protoss Purifier mothership is threatening to wipeout a handful of small outposts (the white dots) on the map.Bonus Objective | Stop the second terror fleet.Bonus Objective | Stop the first terror fleet.Main Objective | Destroy the purifier mothership.Main Objective | Destroy the protoss nexus (3).If you choose to purify the colony, go to the next page. If you choose to protect the colony, follow with the walkthrough below. We suggest making the choice that gives you the research you want. There may also be some moral dilemma here, but we're immune to that. Choosing to protect the colony will give you the opportunity for zerg research while purifying the colony will net you protoss research. Select this mission and, after a cut scene we won't spoil, you have to choose between two sides in completing the mission.

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