Starcraft II Heart of the Swarm Mission Guides Part Four: Zerus Missions

Updated Wed, Mar 13, 2013 by Xerin

StarCraft II Mission Guides

Zerus Missions

Zerus is home of the primal Zerg. This is where the game starts ramping up the difficulty and requiring you to watch more than one thing at a time.

Waking the Ancient Guide

Bonus Objective Reward: +2 Kerrigan levels

New Unit: Mutalisk

The Mutalisk is the primary air unit of the Zerg and is versatile. Used properly, you can take on pretty much most of the campaign with just Mutalisks, outside of their high gas cost, as long as you watch out for anti-air gotchas.


Another mission where you want to start off and begin making drones and making a strong economy. I’m not 100% sure if the game gives you as much time to setup as you want before you leave the base or not, but it’s good to start on the economy and get your gas flowing. You’ll need either Hydralisks or Mutalisks. Mutalisks are preferred because they’re mobile, but either works. As long as they can hit air units, you should be fine.

With that noted, this is how the mission will play out. In the first section you’ll gather biomass and defend biomass, in the second section you’ll have to fight

Gathering Biomass

So, there is two parts to this, the first is that you need to kill the Quillgor, then harvest it (one minute) with a Drone, then walk it to the Ancient One. It’s pretty easy, but watch out for two key things. First, if you harvest two at once, it’s an automatic assault by Brakk. Second, if the drone dies then that counts against you for an achievement, and they will usually attack the drone at some point.

The second part is that Brakk’s forces will constantly be attacking the Quillgor trying to destroy them. You will fail if Brakk destroys 7. In my game, Brakk destroyed zero, so I wouldn’t worry about it too much. What you should do is have two forces, a drone force that kills a Quillgor and defends the drone while harvesting and a defense force that will respond to Brakk’s attempt to destroy a Quillgor.

Defending the Drones (Game of Drones)

The first Quillgor you’ll want to go for is sort of on the western side of the map, near the minerals. Not only is it close, but it gives you an expansion. Mutalisks are very expensive and you’ll be going through a lot of them, so it’s good to get the expansion early, put down a few Spine Crawlers/Spore Launchers and then get your gas going.

At this point, get into the habit of attacking a Quillgor and defending the Drone (you can take some units and click on “move” then click the Drone, they will now escort the Drone) and work on keeping Brakk from taking the lead. Technically, if you don’t care about achievements, you can probably out gather Brakk and just worry with defending your drones.

Now, here’s where it gets difficult. For the achievements, you can’t let more than three drones die. I had one die and it was leaving my base all alone, so I suggest just making sure each Drone has an escort. For the other achievement you need to kill four Primal Hives. These are on the south side of the map and will need a rather considerable force for you to get to and take them out.

Then there is the bonus mission, which is in the northeast and southwest corner, you’ll need to clear out the areas there. You have a nearly unlimited amount of time to do everything in, but you just have to keep on top of keeping Brakk from killing the Quillboar and destroying the Biomass before you can get there.

So I suggest doing the achievement / bonus missions first, then switch over to Biomass gathering. Take out the forces in the two corners for the bonus mission, then take on four Primal Hives for the achievement. Then focus on defending your Drones while they gather.

Now, on to phase two, do NOT finish gathering the Biomass until you’re ready for the map to end.

Drakk Attack

Drakk is rather weak and I was able to finish him off by taking all of my Mutalisks and focusing him down. He walks to your base too, so he comes right out in the open and by this point you probably have enough spare forces that it shouldn’t be an issue just swarming him down.


  • Rude Awakening: Kill four Primal Hives. They are located towards the south.
  • A Game of Drones: Don't lose more than 3 drones, just keep them defended.
  • Waking the Ancient: Complete the mission.

At this point you now have access to the Archives and the ability to alter Kerrigan’s abilities (if not already unlocked). These features are on the main screen.

Next Mission: THE CRUCIBLE


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