Just like the other achievements, you can also earn this achievement within a few seconds. The goal is to kill five enemies in one shot with impact.

Below are a few tips on how this achievement is done:

1. So you’ll need five enemies in order to achieve this, but that’s not it. It would be better if you’ll go to places wherein there are lots of enemies, for there are instances that you’ll not kill exactly five in a row.

2. To improve your chances in this achievement, you can set the difficulty into casual and buy all the impact-related upgrades.

Hint: A good location to do this is at the start of the Marauder defenses. Wherein you’ll encounter a dozen creepers and an alpha creeper. Lure them to getting them as close as possible to one another then use Impact. (This strategy can also be applied for “Hold Still” and “Lock and Load”.

Here below is a video version about the guide: