Liquipedia Walkthrough

Just makes TONS of marines with some medics to heal.

Don't worry about defense too much - they don't usually attack from the side you're attacking. I just stuck with 1 bunker on the left side (keeping the army I was building over on that side) and 2-3 on the right. I salvaged the 2 bunkers on the high ground at and used the minerals to get off too a fast start. Keep about 3 scvs by the bunkers to repair with a couple medics to heal those scvs. I generally move out when the second camp calls out for help.You should have a decent force of marines and medics at this point (I usually try to keep about a 4 or 5 : 1 ratio of marines to medics) After I grab them I attack the bottom left (if I remember right there is 2 hatcheries there). When I did it I just kind of poked in slowly and dragged a few units out at a time to fight me - try not to engage units and spine crawlers at the same time, it is just unessecary losses. After you kill most of the units and spine crawlers at this base - just take down the hatcheries and back off immediately (leave drones alive). When I was doing this the computer rebuilt the hatcheries at this location and i was able to take them down while morphing for the achievement. Don't forget to be constantly making marines/medics to reinforce from your barracks. It's pretty easy if you don't over invest in defense.