Originally Posted by Gamespot
In addition to playing with the default ships included with the game, there's a very cool ship designer that'll let you make your own. ... you can successfully take the approach of designing fleets of small, fast, and pesky fighters that may be effective against larger capital ships if you choose your weapons wisely (defenses are effective only against specific weaponry). Conversely, you may prefer fighting with huge space dreadnoughts, or perhaps mixed fleets. Prudent investment in espionage can give you a crucial advantage in discovering what weapons system the enemy is building, so you can design the most effective weapons and shields to counter them. But be aware that the AI is likely doing some spying of his own.