Heart of the Swarm- Korhal Achievements: Death From Above

Normal Difficulty:

Death From Above (10): Win.

Terran Up the Sky (10): Destroy 20 or more structures before the second time the Psi-Destroyer's field is activated.  This calls for blitzkrieg tactics- while it's easy enough to wipe out the front line of bases before the second activation of the Psi-Destroyer, that won't constitute a whole 20 structures.  You're going to need to pick a side (left or right) of the base to punch through so you can reach more construction facilities- not only are they protected by more turrets, which are relatively quick kills, but many of them have addon structures that also go down quickly.  Investing in troops that can operate at a varied range is something of a must here, or you're going to wind up with your units stumbling over each other and slowing your own assault down, particularly if you have a large number of attacking units.  Do be careful that you don't get stuck out in the field when the Psi-Destroyer's field is activated the first time, though, or you're going to be in a bit of a bind.

Apex Predator (10): Destroy the Power Links without Dehaka dying even once.  This is not hard- he carries a Mend ability and is accompanied by a number of primal Zerg for the second and third power link destruction missions.  If you can't keep Dehaka alive while going after a power link, then you are either rushing too quickly and need to slow down, or you are failing to use his Mend ability in the first place- there really is no reason he should be dying here.

Hard Difficulty:

Nope.  There are no Hard Difficulty achievements for this mission.

Aww.