Drone missile

The drone missile is a secondary upgrade to the machine gun. The missile meanders quite a bit, making it hard to land on isolated foes, but it will turn to follow your crosshairs after you fire it. With a bit of practise you'll be able to hit enemies around obstacles or guide it into a wall to ensure you're detonating it somewhere useful. The explosion is about as powerful as simpler impact grenade, but the drone missile has greater flexibility (and is more entertaining).