Battlecruisers are, without question, the most powerful unit in the game. They have 500 hit points and do 25 damage. A fleet of 12 BCs can easily win a game. There are things that will help your BCs, and things that will hurt them. Here's what you need to know. When making BCs, make sure that you have a good defense. That's always your first priority, and yes, that means tanks, bunkers, and turrets. I've seen people try to go for BCs against me, and they manage to get them pretty fast--but by then I've already killed them. Even if it's going to slow you down a little, make sure you have an adaquate defense. It does you absolutely no good to have all the buildings and resources to create a fleet of BCs if your defense isn't good enough to hold off attacks while you build up your fleet. In order to make BCs, you're going to need a lot of space, and a lot of resources. Do your best to expand as many times as you can, and try to set up a centralized defense to defend all your expansions, because you don't want to waste possible supply on unnecessary defense. Make sure that you stay ahead on the supply, and upgrade early. You'll need 2 armories, and I recommend you get them both before you even have a Starport. You also want to make sure you research Yamato Gun to take out pesky turrets, and research the energy upgrade if you have enough cash. I recommend 6 Starports with add-ons for people going BC.