By now, if youve read the description, the dev says hes not making more drones for awhile. This list should help come up with ideas, though.

1. THE NANO SWARM!
Very tiny drones that are in a swarm. They act like bees, and will break ANYTHING they come into contact with such as wood, barrels, barricades, and even vehicles and other drones. they stay in one giant swarm, and they can be defeated with explosives or a combine energy ball. (Named: Nano Swarm)

2. RC XD Style.
An RC car that is styled like BO2s RC XD. It shoots pistol rounds, and if needed, can self destruct. It can have a variation without weapons or explosives.(Named: Ground Drone.)

3. Itsy Bitsy spider
A small drone that resembles a spider. Its like a tank sort of, but has six legs instead of eight, and each leg has treads like a tank on them, but may also be used for walking (press ctrl to switch from roll to walk). Its weapons are anti aircraft missiles (to take down other drones) and pistol rounds.

Last, but not least, and the most terrifying of all,
4. Stealth Drone.
This thing can turn invisible (for up to 30 seconds), cut off ALL sound (Permanent), fire anti ground unit missiles, fire pulse rifle rounds, and fire combine energy balls.

Thank you for your amazing addon, and good luck squishing all the bugs.