Description: In BrainDef you must defend the brain of course! lol Defend from the enemy waves using a variety of guns. You will start with a sniper tower and a lazer tower. Swap between these as you run out of on and other. You will earn cash to not only upgrade weapons but but new ones, some of which you will control and others will auto fire. Just make sure you use them all in defense of the brain when you play.