This may be the second achievement you get, as I got it shortly after the 20 hit combo. Toward the end of the first area in Mission 1, you will have to destroy a teleporter and stop enemies from coming through.
Simply avoid destroying the teleporter and use simple combos like X X X and X X X X, and you will get it in no time. Stay close to the bubble as they come out, and evade as if you get hit the counter restarts.
If you leave negative feedback, please comment why as so I can adjust this. Thanks.