Battle.net

Destroy 5 units with a single Neural Parasited unit in an Unranked or Ranked game.

Have 21 Zerg units morphing simultaneously in an Unranked or Ranked game.

Complete 20 missions in the Wings of Liberty campaign on Hard difficulty.

Score the rank of Gold in the “Infestation” challenge mission.

Destroy a total of 100 enemy units in Free-for-All Quick Match games.