An easy way to get this achievement is in Offline Team Deathmatch.
From the main menu, click on Play
, then Training,
then Offline Team Deathmatch.
Each match lasts 5 minutes, or until a team reaches 20 kills. So if you average 2 kills per minute relatively quickly, you'll be just fine.
Use any mech you want. I personally find the Vanguard Type-C Heavy helpful, as it has more health.
The important thing for the achievement is obviously not to die. So pay attention to your health and press and hold
when it's safe to heal. Another thing to pay attention to is your kill streak, displayed in the top left of your health bar.Each yellow skull = 1 kill
Each blue skull = 5 kills
Once you get 10 kills without dying, the achievement will unlock. Good luck!