Outpost Kaloki X

SamuraisShadow's guide is excellent; however, I have few pointers of my own.

They always attack guns first, so build all your guns on one side of the station. While the guns ammo will bend around the station, guns on the complete opposite side won't even fire, plus takes less time for the missile to get to the target increasing your damage per second. Also, ensure the Big Bertha with Freakin' Bombs is set. Upgrade your guns in the early part during downtime if you have too.

The brains count as Science tech, so their is no reason to continue to have chem labs and other science tech up and running as well, build up to the Observatory, selling them when convenient. Turn off one of your Brains to conserve power.

You should really only need 3 or 4 Dynamo Generators. Since you will only have a Brain a couple of glitched Hangar 1s, a Singles Line, a Flower, a Newstand, and possibly a Lemonade Stand, and a whole lot of Big Berthas there is no real need for lots of power.

Keep an eye on your Big Berthas, and if one is about to go before you can repair it, sell it so you can recoup a little money, to build a new one.

Finally if you are nearing the 15:00 mark, but are hemorraging damage and not getting money from your cash cows, sell them off quickly and try to build Big Bertha's. This will cause the enemy to stop attacking the Brains and focus on the guns and give you those precious few seconds need to get the acheivement. I was able to build 2 guns at the last second, and my repair bots kept them alive long enough to give me roughly 15 to 20 extra second. I finshed the round with 15:19 on the clock. Hope this helps.

The key is to building more than one repair expansions. And lots of guns. You only need a few cash raising expansions. Focus on Power, Guns, and Repair.