This is actually a really cute game. There are a TON of different droids, varying from: movement type, weapons, power output, battery size (for weapons), hull, armor types, and on and on. You start with one simple droid, and gain the ability to hijack others for your cause, assuming you have enough points to do so. Droids often drop permanant upgrades on death, sometimes armor and health boosts for your droids. Each level is all about domination, whether you do that by turncoating the enemies or simply killing them outright, you win. Droids you hack to your team stay on your team from level to level until they are killed. You can also swap between any droid in your little army.
Very, very fun.