Flying Drone

Description
The Flying Drone is a robot enemy encountered very early in the game, and is usually one of the first ones you'll encounter. Like most enemies, flying drones come in multiple varieties and are color-coded according to their method of attack.

Blue Drone
Blue drones will pursue the player once detected and will attempt to fly circles around the player while occasionally firing single energy bolts. They go down when struck by a single shot from any weapon, but their speed can make them difficult to hit, especially when they get close.

Green Drone
Green drones are kamikaze drones, and are not equipped with a weapon. Instead, they are more heavily armored and equipped with explosives. Upon detecting the player, the green drone will fly directly towards the player while sounding an alarm. Once the drone is nearly touching the player, it will spin in circles for about three seconds before exploding, causing heavy damage to everything around it. Due to its heavy armor, it takes multiple hits to bring a green drone down, and destroying it will trigger its detonation.

Pink Drone
Pink drones are similar to blue drones both in their flight paths and durability, however once a pink drone homes in on the player, it will begin firing a non-stop barrage of energy pulses at a rapid rate of fire. Despite this being the only difference between the pink and blue versions, this makes the pink drone exponentially more dangerous.

Tactics
Blue and Pink drones should be shot as soon as possible, prioritizing them over most other targets. If possible, try to fall back into an area you've already cleared and let the drones come to you, but make sure you have the ability to drop behind cover, especially in the case of pink drones, which can chew you up very quickly with their machine guns.

Green drones should be destroyed at a distance whenever possible. Barring that, luring them near a corner and then triggering their self-destruct before ducking behind cover works as well.