Mission 1 - Dark Whispers | Achievements - Whispers of Oblivion SC II: Legacy of the Void Guide

Dark Whispers. Requires you to complete the mission on any difficulty level.

Massive Aggressive. Destroy 30 zerg units during the mission. This achievement requires some preparations as both the zerg base and all of their attack groups are large and very dangerous. It is best to obtain this achievement before freeing the last group of imprisoned protoss [12] as then you will have the largest army. Gather your forces next to zerg marching route, wait for the enemy to pass next to you and then attack them from behind, killing as many units as possible. If you have a strong army, you might be able to repel the enemy attack. If not, you will greatly weaken Kerrigan forces. To be sure that you killed 30 enemy units, break two groups of zerg forces. Another tactic is attacking the back of zerg army when it will be occupied with fighting terran, for example while storming their last, best fortified base. Zerg from the back are dangerous, but they will be easier target than the whole army. Thanks to that, you will have lesser losses and you will be able to repeat the operation during the next zerg attacks. No matter how many zerg you will kill, you will make it easier for terran to defend themselves, and thus you will gain some additional time to complete the mission and obtain the achievement. If the zerg are far from the reactor, use the available time for creating stronger, more advanced units, which will make it easier to defeat enemy army.

World of Warpcraft. Destroy 6 terran units when they will teleport to the battlefield on normal difficulty level. A troublesome mission, as both pylon containment units [5][11] to which the terrans will teleport are protected. In other words, you will have to ignore the defenders and attack the appearing units, which will greatly increase the losses of your army and will require a good army management from you (dividing into smaller groups, pointing the attack targets manually and so on). In addition to that, you must kill them during the teleportation, which takes few seconds, otherwise you will not receive the achievement. Another way is building so big army that both the defenders and the teleporting units will be killed instantly. Remember that you have two chances to gain this achievement as there are two pylon containment units on the map. You can kill three terran units at the first one and another three at the second one. This will make obtaining the achievement much easier. To make obtaining the achievement even more easier, save the game before getting close to the pylon containment units.