Enemies/Radial Cannon

**Radial Cannons** are powerful tower enemies that shoot radial waves of projectiles in specified angles and often in multiple directions.

## Radial Cannon

* Blue
* Green
* Yellow
* Red

## Description

### Stage Appearance

**Blue*** Stage 5

**Green**

* Stage 5

**Yellow**

* Stage 5
* Stage 10
* Stage 11

**Red**

* Stage 4
* Stage 5
* Stage 6
* Stage 7
* Stage 8
* Stage 9
* Stage 10
* Stage 11
* Stage 12
* Stage B1
* Stage B2
* Tournament

## Statistics

### Damage

Varies by difficulties and types.*(With max Health upgrades)*
**Blue, Green and Red (5 directions, long spiraling streams or waves 6 projectiles each)**

* Normal: 13%
* Hard: 26%
* Insane: 49%
* Nightmare: 53%

**Yellow, Red (12 directions, streams 3 projectiles each) and Red (3 directions, long spiraling streams)**

* Normal: 10%
* Hard: 20%
* Insane: 30%
* Nightmare: 40%

**Red (12 directions, waves 3 - 4 projectiles each)**

* Normal: 16%
* Hard: 33%
* Insane: 50%
* Nightmare: 66%

**Red (5 directions, long twisting streams)**

* Normal: 6%
* Hard: 13%
* Insane: 20%
* Nightmare: 26%

## Reward

### Score Reward

* Blue: 750
* Green: 1000
* Yellow: 1500
* Red: 2000

### Star Reward

* Blue: N/A
* Green: N/A
* Yellow: 10
* Red (12 directions, waves 3 - 4 projectiles each): 15
* Red (5 directions, long twisting streams): 10
* Red (12 directions, streams 3 projectiles each): 10
* Red (5 directions, long spiraling streams or waves 6 projectiles each): 15
* Red (3 directions, long spiraling streams): 15

## Appearance

Radial Cannon appears as a metal tower in a shape of a rounded square, with four base supports on each side of the body.

On the top holds the armament of the Radial Cannon. which is raised and circular in shape. At the center is a gray core, surrounding the core are twelve lights of equal sizes whose color hints at the Cannon's firing patterns. Except for red types, the lights activate alternatively in a clockwise pattern. Rotating around the armament are a number of blue lights that matches the number of angles the Cannon can fire at (except for red variants).

The twelve lights can only display one color in unison, this color can be one in four: blue, green, yellow or red.

BlueGreenYellowRed
## Behavior

### General

Radial Cannons are stationary and cannot move.

As a tower enemy, Radial Cannons have noticeably more health compared to some other enemies. In addition, a red health bar appears above the Cannon if it's damaged, disappearing after being left intact for a while.

Radial Cannons cannot be collided with; the Plane simply flies past them.

Radial Cannons rarely drop Health Restore items upon destruction.

### Armament

Radial Cannons do not target the player's Plane directly, instead they discharge large number of projectiles in a radial pattern around them. Therefore, the Holo Granny Technician cannot distract them with its decoys, as they don't even aim at anything to begin with.

These projectiles only damage the Plane (and phase through other enemies) and cannot be destroyed by its projectiles and Laser power-up. However, it can be absorbed by Energy Shields, destroyed by Mega Bombs and Iron Clad's Main Weapon Supercharge shockwaves, and slowed by Slo Mo Chan's ability.

Radial Cannons' health, damage and fire rate increase along with higher difficulty levels.

Radial Cannons have a wide variety of types, each with different patterns, fire rates and damages.

#### Blue

The most basic type, it discharges single projectiles horizontally in opposite directions, with a total of two per volley. Shoots three times before reloading. The projectiles are dark blue, travel slowly but deal moderately high damage on contact.

This variation is exclusive to Stage 5.

#### Green

Same as the blue variations, except it shoots in four directions, with each adjacent one perpendicular to one another. They shoot the same projectiles as the blue type with similar properties, five times before reloading.

Along with the blue variation, green Radial Cannons are exclusive to Stage 5.

#### Yellow

Shoots a straight stream of three projectiles at six angles (60 degree apart), a total of 18 projectiles each volley. After discharging four times, it reloads for a short time. The projectiles are dark blue, travels slowly and deal moderate damage on contact.

This variation appears on Stage 5, Stage 10 and Stage 11.

#### Red

Red Radial Cannons have multiple sub-variants, described below by order of their first encounters.

##### Twelve directions, waves of three projectiles each

Shoots a wave cluster of three projectiles in twelve directions (30 degree apart) for a total of 36 projectiles, each of which travels fast and deals high damage on contact. It takes time to reload between each volley consistently. The projectiles are blue and leave behind a white trail.

This variation appears on Stage 4 and Stage 9.

##### Five directions, long twisting streams

Shoots a long, twisting streams of 20 projectiles each, in five directions (72 degree apart), for a total of 100 projectiles per volley, after which it reloads for a short time. The projectiles are small, dark blue in color, travel slowly and deal light damage.

This variation appears on Stage 5 and Stage 10.

##### Twelve directions, streams of three projectiles each.

Function similarly to yellow Radial Cannons, instead shooting at twelve directions (total of 36 projectiles) at a slower discharge frequency. Its projectiles appear similarly to the first red variant, though they in reality bear the same properties to those discharged by yellow variants (damage included).

This variant appears on Stage 6, Stage 8 and Stage 11.

##### Five directions, long spiraling streams

Shoots a long, clockwise spiraling streams of nine projectiles each, in five directions (total of 45 projectiles per volley). It has a very short cooldown between each volley, and on Insane difficulty said cooldown is so short the streams connect with each other into an inexhaustible one. It fires dark blue projectiles, with the same properties as those discharged by blue and green Radial Cannons.

This variant appears on Stage 7 and Stage 12.

##### Twelve directions, waves of four projectiles each

Shoots a wave cluster of four projectiles in twelve directions (30 degree apart) for a total of 48 projectiles, each of which deals high damage on contact (the same as first variant), initially travels at a very fast speed until it decelerates greatly. This variant discharge three volleys before reloading. The projectiles are blue and leave behind a white trail.

This variant appears on Stage 11 and Stage 12.

##### Five directions, wave of six projectiles each

Shoots a wave of six projectiles each in five directions, for a total of 30 projectiles per volley. After discharging thrice, it reloads for a slight duration. The projectiles are dark blue and bear the same properties as those shoots by blue and green Radial Cannons (including the same moderately high damage).

This variant is exclusive to Stage B1.

##### Three directions, long spiraling streams

Shoots a long, clockwise spiraling streams of thirteen projectiles each in three directions (120 degree apart), for a total of 39 projectiles per volley. Between each volley is a moderate cooldown. The projectiles are dark blue and shares the same properties as those shot from yellow Radial Cannons (with similar moderate damage).

This variant is exclusive to Stage B2.

## Strategy

* Red Radial Cannons are highly dangerous enemies due to their high damage and multiple projectiles per shot, both combined to quickly create a dense and deadly field of projectiles when the Cannon is left intact for too long. Prioritize and destroy them as soon as they appear, perhaps with the use of the Main Weapon Supercharge ability. Upgrade your Plane's firepower often to helps burst down their high health, especially on higher difficulty levels.
* Practice memorizing the locations and their respective patterns to dodge in time and not be caught off-guard, especially against 1st and 5th variants of red Radial Cannons due to their high projectile speed and damage.
* The Slo Mo Chan Technician perform well against Radial Cannons by slowing down fast projectiles or create maneuvering windows between fields of their projectiles. Slo Mo Chan also reduces the maximum range of some variants, buying you more time to shoot from afar.
* When cornered by Radial Cannons' projectiles, quickly free yourself with a charge of Energy Shield or Mega Bomb, otherwise the Plane will suffer heavy damage or even destruction due to their waves of projectiles and nearby enemies' concentrated firepower.

## Trivia

* Radial Cannon is a popular armament among Bosses, used by the following: Spinning Retaliation, Murky Huntress, Frying Falcon, Araneae Lebes, The Scarlet Heart and Lewiatan. Omega's engines perhaps can also be counted.
* All four colors of Radial Cannons also existed in *Sky Force Anniversary*. However, despite the red and yellow variants having changes to their patterns when brought into *Reloaded*, the blue and green variants remain exactly the same as their previous counterparts.
* The Plane's missiles have a prioritize system, which usually targets Radial Cannons over other enemies whenever they are in view.

## Images

A burning Radial Cannon wreckage, with blue electric sparks around it.
1. ↑ 1.0 1.1 Exclusive to Stage 5, therefore containing no Star reward.