If you're like me and have already played Interception Mode check your achievements and make sure you don't already have this.
Even if you haven't booted Warframe up you may have this achievement pre-popped.
If you're first going for it this game type is best played with 3 people. The only real method is for your team to be quick and kill as much as possible.
There are 4 points A, B, C and D.
I had 2 players watching 2 at all times and one checking on all 4 and helping where needed.
Once finished exit the map and finish the level.