Unlockables are a game mechanic first introduced in Revenge of the Yolk. They are additional features which first have to be unlocked (in Revenge of the Yolk by finishing the game and in Ultimate Omelette onwards by paying with Keys) that can either make the game easier, harder, or only provide a cosmetic change.
In this game to unlock new unlockables, you need to complete a mission without using Cheats. After that the unlockables are unlocked depending on the Difficulty:
Rookie - unlocks only 1 unlockable from its unique unlockables. After unlocking its 3 unlockables, you will be no longer able to get more in this difficulty.
Veteran - unlocks two unlockables - one from its pool and another from Rookie's pool. If all Rookie unlockables have been unlocked, it will unlock one more unlockable from its own pool. After unlocking every unlockable but the one unique to Superstar Hero, you will be no longer able to get more in this difficulty.
Superstar Hero - unlocks three unlockables - one from its pool, one from Veteran's pool and one from Rookie's pool. Once this difficulty's pool is depleted (and it can easily happen since it has only one), it will take unlockables from Veteran's pool. Once that is depleted too, it will pull from Rookie's pool. This is where all of the unlockables can be unlocked at once.
Pools
Each difficulty has its own pool of unlocks to pull from. They're always pulled from in the order listed.
In those games, unlockables have to be unlocked by first collecting a specific amount of Keys and spending them in the Unlockables menu. They can be unlocked in any order you want.
List of Unlocks
Note: This page will only list the unlockables, and not explain them. If you want to know more about them, click on those games' pages on unlockables - Revenge of the Yolk, Ultimate Omelette, Cluck of the Dark Side. What will be also listed here are the appearances of each unlockable.
In total, there are 38 different Unlockables in the games.
Weapon related unlocks add new weapons (usually from Revenge of the Yolk, change existing ones or change up the Gift pool. There are 5 such unlockables.
Super Secret Mine Bombs - Revenge of the Yolk, Ultimate Omelette, Cluck of the Dark Side
Secret Weapon/Utensil Poker - Revenge of the Yolk, Ultimate Omelette, Cluck of the Dark Side
Plasma Rifle - Ultimate Omelette, Cluck of the Dark Side
Satellite related unlocks add docks for you to be able to hold more satellites and change the satellite pool. There are 5 such unlockables.
Satellites Rush - Ultimate Omelette
Extra Dock (Aft Port Side) - Ultimate Omelette, Cluck of the Dark Side
Extra Dock (Aft Starboard Side) - Ultimate Omelette, Cluck of the Dark Side
Extra Dock (Outer Port Side) - Ultimate Omelette, Cluck of the Dark Side
Extra Dock (Outer Starboard Side) - Ultimate Omelette, Cluck of the Dark Side
UI
UI related unlocks add stuff to the UI, such as progress bars or indicators. There are 4 such unlockables.
Damage Indicator - Revenge of the Yolk, Ultimate Omelette, Cluck of the Dark Side
Progress Indicator - Revenge of the Yolk, Ultimate Omelette, Cluck of the Dark Side
Points Indicator - Revenge of the Yolk, Ultimate Omelette, Cluck of the Dark Side
Destruction Meter - Ultimate Omelette, Cluck of the Dark Side
Difficulty
Difficulty related unlocks add new difficulties or change the rules of the game. There are 5 such unlockables.
Superstar Hero - Revenge of the Yolk, Ultimate Omelette, Cluck of the Dark Side
Scoring (Start with 1 Life) - Cluck of the Dark Side
Scoring (No Extra Lifes) - Cluck of the Dark Side
Scoring (More Food for Missiles) - Cluck of the Dark Side
Scoring (Limited Powerups) - Cluck of the Dark Side
Cosmetic
Cosmetic unlocks only change stuff visually, without any other effect, positive or negative. Cosmetic unlocks from one game never make it to the ones following it. There are 7 such unlockables.
Clupea Harengus (Red) - Revenge of the Yolk
Leotards - Ultimate Omelette
Underwear - Cluck of the Dark Side
CI1 Space Background - Cluck of the Dark Side
CI2 Space Background - Cluck of the Dark Side
CI3 Space Background - Cluck of the Dark Side
CI4 Space Background - Cluck of the Dark Side
Spaceship
Spaceship unlocks add more options to customizing your spaceship, or directly change the look of it. There are 9 such unlockables.
Ion Blaster Gift • Neutron Gun Gift • Laser Cannon Gift • Vulcan Chaingun Gift • Lightning Fryer Gift • Plasma Rifle Gift • Utensil Poker Gift • Boron Railgun Gift • Photon Swarm Gift • Positron Stream Gift • Hypergun Gift • Riddler Gift • Corn Shotgun Gift • Atomic Powerup
Ion Blaster Gift • Neutron Gun Gift • Laser Cannon Gift • Vulcan Chaingun Gift • Lightning Fryer Gift • Plasma Rifle Gift • Utensil Poker Gift • Boron Railgun Gift • Photon Swarm Gift • Positron Stream Gift • Atomic Powerup
Ion Blaster Gift • Neutron Gun Gift • Laser Cannon Gift • Vulcan Chaingun Gift • Lightning Fryer Gift • Plasma Rifle Gift • Utensil Poker Gift • Atomic Powerup