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Unlockables are additional features that have to be first unlocked to be able to be enabled. In Cluck of the Dark Side, this process is identical to the one seen in Ultimate Omelette.
Unlocking[]
Unlockables menu.
In this game, unlockables have to be unlocked by collecting a specific amount of Keys and spending them in the Unlockables menu. On average, you should receive per mission 50 
on Rookie, 75 on Veteran, and 100 on Superstar Hero. 3710 are required to buy every Unlockable listed here so you'll have to play through atleast 37 missions. Luckily, in this game there are also unlockables that help you gain more keys. Gold Digger allows them to drop 25% more often, and Scoring unlocks let you obtain more through making you clear waves much slower. Unlockables in this game can be unlocked in any order you want.
List of Unlocks[]
There are 31 Unlockables available - 5 weapon related, 4 satellite related, 4 UI related, 5 Difficulty related, 5 cosmetic, 5 spaceship related and 3 special paintjobs.
Weapons[]
Weapon related unlocks add new weapons, change existing ones or change up the Gift pool. No new unlockables have been added since Ultimate Omelette.
Utensil Poker[]
An Utensil Poker Gift found in Wave 46.
Cost - 150
This weapon is returning yet again from Revenge of the Yolk. It is designed to be the best weapon available, made with the only purpose of dispatching the Chicken invaders. It is available in-game from Chapter 5.
Plasma Rifle[]
A Plasma Rifle Gift found in Wave 44.
Cost - 75
This weapon is returning yet again from Revenge of the Yolk, and it has to be unlocked to appear in-game. It's the military-issue brother of the Lightning Fryer, which delivers more damage to an enemy and has better auto-lock, but it also overheats faster. It is available in-game from Chapter 5.
Vulcan Chaingun[]
A Vulcan Chaingun Gift found in Wave 46.
Cost - 75
This weapon is returning yet again from Revenge of the Yolk, and it now has to be unlocked to appear in-game. It fires multiple ultra-fast metal shards which deal minimal damage at an extremely fast rate. It is available in-game from Chapter 5.
Mine Bombs[]
A Mine Bomb about to be used on the first encounter with the Henterprise.
Cost - 100
Replaces Missiles with Mine Bombs. This unlockable changes the way they're detonated. Regular missiles detonate when they reach the center of the screen, and mine bombs always detonate one second after they were planted. Other than that, they're exactly like the Missiles. In this game, the color of their effect has been changed to be orange.
Weapons Rush[]
An Utensil Poker present spawning in Wave 17 under the effect of this unlockable.
Cost - 60
Weapons Rush allows all weapons to drop right from Wave 1, instead of them being locked until specific chapters are reached.
Satellites[]
Satellite related unlocks add docks for you to be able to hold more satellites. Satellites Rush isn't returning from Ultimate Omelette as it's enabled on default, and the docks have been made cheaper.
Extra Dock (Aft Port Side)[]
Barbequer about to be docked to this dock.
Cost - 150
Adds an extra satellite dock behind the spaceship's left side.
Extra Dock (Aft Starboard Side)[]
Bird-Flu Gun about to be docked to this dock.
Cost - 150
Adds an extra satellite dock behind the spaceship's right side.
Extra Dock (Outer Port Side)[]
Bird-Flu Gun docked to this dock.
Cost - 150
Adds an extra satellite dock to the left of the spaceship's left side, which can be used only after the dock closer to the spaceship is taken.
Extra Dock (Outer Port Side)[]
Bird-Flu Gun about to be docked to this dock.
Cost - 150
Adds an extra satellite dock to the right of the spaceship's right side, which can be used only after the dock closer to the spaceship is taken.
UI[]
UI related unlocks add stuff to the UI, such as progress bars or indicators. Nothing related to them has been changed since Ultimate Omelette.
Progress Indicator[]
Progress Indicator enabled on Wave 2.
Cost - 50
It enables the boss progress bar outside of the boss waves.
Damage Indicator[]
Shown damage received by Chicks.
Cost - 50
When an enemy receives damage, red text will appear showing exactly how much damage it took.
Point Indicator[]
Shown points received from Chickens.
Cost - 50
When you receive points, green text will appear showing exactly how much points you gained.
Destruction Meter[]
Destruction Meter on the Henterprise encounter.
Cost - 50
This Unlockable adds another way to measure damage. Whenever something is hit, the damage it took (multiplied by four) shows up on it.
Difficulty[]
Difficulty related unlocks add new difficulties or change the rules of the game. Aside from the always present Superstar Hero unlockable, this game adds Scoring unlockables, which as has been said earlier change the rules of the game to make it harder in exchange for letting you gain more points.
Superstar Hero[]
Superstar Hero option chosen on the mission screen.
Cost - 40
It unlocks the hardest difficulty in the game. In it, your weapons deal a third of the damage they usually do, but you gain nine times as much points as in Rookie. This difficulty also lets you gain more keys in a single mission.
Scoring (Start with 1 Life)[]
With this unlockable enabled, you start with one life as seen here.
Cost - 100
When this unlockable is enabled, you start the game with one life. In exchange, it lets you gain 10% more points. It can be applied only to new missions.
Internally, this unlockable is called "One Life".
Scoring (No Extra Lifes)[]
With this unlockable enabled, you'll never be able to gain more lifes than the ones you started with.
Cost - 100
When this unlockable is enabled, you can no longer gain extra lifes. In exchange, it lets you gain 10% more points. It can be applied only to new missions.
Scoring (More Food for Missiles)[]
With this unlockable enabled, you'll have to get twice as much Food to gain a Missile. In this image, the player currently has 99 Food units.
Cost - 100
When this unlockable is enabled, you need to obtain twice as much Food as normal to gain a Missile. In exchange, it lets you gain 10% more points. It can be applied only to new missions.
Internally, this unlockable is called "Halve Missiles".
Scoring (Limited Powerups)[]
With this unlockable enabled, Atomic Powerups will almost never spawn. As seen on the image though, this unlockable lets you gain 20% more score than usual.
Cost - 100
When this unlockable is enabled, Atomic Powerups never spawn (except for Charity and certain bosses, like the Henterprise), so you can only upgrade your power levels through presents, Charity and from certain bosses. In exchange, it lets you gain 20% more points. It can be applied only to new missions.
Internally, this unlockable is called "No Powerups".
Cosmetic[]
Cosmetic unlocks only change stuff visually, without any other effect, positive or negative. Here engine unlockables have been dropped in favor of space backgrounds from earlier games, and a new costume for Chickens replacing the old leotards.
Space Background (Chicken Invaders)[]
Wave 2 with the space background from CI1.
Cost - 10
Allows you to play with the space background from the first game.
Space Background (The Next Wave)[]
Wave 2 with the space background from CI2.
Cost - 10
Allows you to play with the space background from The Next Wave.
Space Background (Revenge of the Yolk)[]
Wave 2 with the space background from CI3.
Cost - 10
Allows you to play with the space background from Revenge of the Yolk.
Space Background (Ultimate Omelette)[]
Wave 2 with the space background from CI4.
Cost - 10
Allows you to play with the space background from Ultimate Omelette.
Underwear[]
Chickens in Wave 2 wearing their underwear.
Cost - 20
This unlock makes all Ordinary Chickens wear their underwear. Every other Chicken types aren't affected.
Spaceship[]
Spaceship unlocks add more options to customizing your spaceship. Previously, the engines had to be bought as unlockables and Hen Solo's ship was available.
Fuselage[]
The Hero's M-404 PI with an orange fuselage using a different paintjob than usual.
Cost - 30
Allows you to change the color and the paintjob of the ship's fuselage. 42 colors and 5 paintjobs are available.
Weapon Pods[]
The Hero's M-404 PI with orange weapon pods.
Cost - 30
Allows you to change the color and the paintjob of the ship's weapon pods. 42 colors and 5 paintjobs are available.
Tail Wing[]
The Hero's M-404 PI with an orange tail wing using a different paintjob than usual.
Cost - 30
Allows you to change the color and the paintjob of the ship's tail wing. 42 colors and 5 paintjobs are available.
Intensity[]
The Hero's M-404 PI with the paintjob being less visible than usual.
Cost - 30
Allows you to change the intensity of the spaceship's paintjob. 5 options are available.
Shininess[]
The Hero's M-404 PI being much more shiny than usual.
Cost - 30
Allows you to change the shininess of the spaceship. 5 options are available.
Special Paintjobs[]
Special Paintjobs add various benefits when used. Only one can be used at a time. Previously they weren't a thing in the earlier games.
Gold Digger[]
The Hero's M-404 PI using the Gold Digger spaceship with an enemy containing a Key.
Cost - 300
This paintjob coats the spaceship with gold. While using it, appear 25% more often.
White Knight[]
The Hero's M-404 PI using the White Knight spaceship with ⚡5.
Cost - 500
This paintjob makes the spaceship entirely white. While using it, you'll start with ⚡5, and you'll never be able to go below ⚡5.
Space Ninja[]
The Hero's M-404 PI using the Space Ninja spaceship with his Hypergun dealing more damage than usual.
Cost - 1000
This paintjob makes the spaceship dark red. While using it, you'll deal 20% more damage to enemies.
Trivia[]
- At first, the game did not include space background unlockables. In 0.20BETA, space backgrounds from sequels of Chicken Invaders were added, and in 0.30BETA, the space background from that game was also added.
- Certain unlockables costed much more in 0.10BETA.