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Turret

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Turrets are defensive structures that can be crafted after being researched. They come in two different tiers with different health, shooting speed, range, ammunition, damage type and damage per shot.


Gun Turrets

Gun turrets are very basic and cheap defensive structures and the simplest element of automatic defenses. They use magazines for ammunition which can be refilled manually or by inserters. They do not require power and can operate practically anywhere as long as they have sufficient ammunition. Gun turrets deal double damage per shot as compared to the man-portable pistol and submachine gun, but have somewhat lower fire rate than the latter, so absent any turret-specific upgrades it does 1.33 times as much damage per second as the submachine guns. The gun turret receives bonuses from technologies that improve bullets so it keeps pace with the submachine gun as those improve, and they also receive bonuses from their own damage upgrade. These two damage effects stack multiplicatively: fully upgraded, bullets do 2.2 times as much damage as a standard bullet, and turrets do 2.2 times as much damage as a standard turret, so bullets from a turret do 2.2×2.2=4.84 times as much damage as without the upgrades, totaling 19.36 damage from regular and 48.4 damage from piercing bullets, more than fully-upgraded laser turrets can provide, though still not quite enough to kill medium spitters in a single shot.

Prerequisites
Recipe: +++
Time icon.png
10
=>
Total raw: +
Health: 400
Damage Based on ammunition damage (Physical)
Shooting speed 10 shots/second
Damage bonus 100%
Range: 17
Ammunition:
Upgrades:

Laser Turrets

Laser turrets are an advanced defense building with a longer range, good damage and use electricity to operate (and when idle). Dealing laser damage they don't face any resistances (enemies receive full damage) but have a lower rate of fire than gun turrets. Each shot costs a constant 800kJ of energy; as the shooting speed increases through upgrades, so too does the power required to keep firing.

Prerequisites
Recipe:
Time icon.png
20
+ + +
Battery.png
12
=>
Total raw:
Time icon.png
45
Battery.png
12
Health: 1000
Max power: 2.4 MW (electric)
Energy consumption on standby 6 kW
Damage 20 (Laser)
Shooting speed 3 shots/second
Range: 25
Upgrades:


Flamethrower Turret

Flamethrower turrets provide literal fire support, setting enemies on fire and doing damage over time. Unlike the previous turrets, they have a limited firing arc, therefore should be place at choke points or behind walls. They use liquids as ammunition, which requires dedicated fluid pumping, capable of using crude oil, heavy oil, or light oil. Different liquids provide further damage bonuses. (Light is 110%)

Currently, flamethrower turrets have a tendency to miss the first row of biters, as unlike the laser and gun turrets they do not have a seeking projectile. The second biters in line will not be so lucky, however.

Prerequisites
Flamethrower.png
Recipe:
Time icon.png
20
+ + +
Pipe.png
10
+ =>
Total raw:
Time icon.png
32.5
Health: 1400
Max ammo: 2.4 MW (electric)
Energy consumption on standby 6 kW
Damage 30 (Fire)
Damage Over Time 45/s (Fire)
Area of Effect size 2.5 tiles
Range: 30
Upgrades:

See also