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Starcraft 2: Heart of the Swarm Walkthrough Zergling Evolution

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To start the mission, go to the evolution pit...

...and press on "Evolution Mission".

You start off with a few zerglings.

Destroy the creators to the right.

You will then acquire raptorlings.

Raptorlings can jump up and down cliffs and do more damage per attack.

Destroy the terran encampents.

After you're done with that, you will go to a base.

Make as many zerglings as you can.

You will spawn the swarmlings. 3 swarmlings hatch per egg, and each zeglings costs 33 percent less.

They also spawn almost instantly. Destroy the terran attacking force.

Destroy the rest of the terran base.

At the end of every evolution mission, you will get to pick between 2 variants of a unit.

I picked the swarmlings.