Heart of the Swarm Campaign- Umoja Achievements: Lab Rat

Normal Difficulty:

Lab Rat (10): To accomplish this achievement, complete the mission.  Woo?

Mighty Mouse (10):  This achievement is gained by destroying 35 of the defending Sentry Bots in the mission- pretty much all of them.  This may take a little bit of care to make sure you find all of them and definitely requires going after the zergling containment units in order to reach them, but isn't exactly difficult.

Rat Race (10): The timed achievement for this mission, accomplishing Rat Race requires concluding the mission in ten minutes or less.  Not a tremendous challenge, but it can present some problems if you also try for Mighty Mouse in the same playthrough.

Hard Difficulty:

Mad Dash (10): Destroy 3 factory buildings in the Lab Rat mission in 10 minutes or less.  This is actually concretely harder than completing the mission, since two of the four factories present are behind the Eradicator, and the mission ends when that dies.  Expect to lose a lot of zerglings accomplishing this and only really even make it if you can keep building more the entire time you're progressing through the mission.