Stars are a fundamental element in the Angry Birds series, present in all levels. Stars are used as a format of a ranking system. In each level, stars can be earned by completing a level. With one being for simply completing the level, two for finishing the level while also having a good score, and three for finishing the level while also obtaining a hard-to-obtain score for that level, or utilizing a complex tactic to finish off the pigs using fewer birds, and with more damage to the structure itself. The difficulty for obtaining a three-star ranking varies with each level.
Sometimes, the player may see the stars appear also with a new high score.
Format
When a stage is first unlocked, there is no written score or stars collected. As stated above, to collect stars, the player must finish the level, and based on their performance, they will be given a minimum of one or maximum of three stars for the level. If the player is able to do this for all of the levels offered in an episode, a Golden Egg is given to the player. These variants of Golden Eggs are the most difficult to obtain. In the original Angry Birds, the Three-Star Golden Eggs unlock a minigame that if its functions are done in a specific way, they will receive a Golden Egg Star. In Angry Birds Seasons, Three-Star Golden Egg levels are actual levels that are played like any other level in the series. In version 2.0.0 of regular Angry Birds and version 2.5.0, the star format changes to that of Angry Birds Rio's.
The player receiving two stars for almost completing the level perfectly, in the original Angry Birds
Three stars in Angry Birds Rio
Current stars in v3.3.0+ (2.2.0+ with Retina Display) in the original Angry Birds
The pepperoni slices in Angry Birds Telepizza.
The music notes in Angry Birds Music.
In Bad Piggies, stars are obtained in a different way. Unlike being obtained by scoring points, stars are obtained by completing certain tasks. A certain amount of stars are given: one star if the player completes one of the three tasks (usually getting the pig to the destination) 
, two stars if the player completes two of the three tasks, and three stars 
if the player completes all tasks on the top of the screen.
Trivia
- Many other physics-based iOS games, such as Amazing Alex, Cut the Rope and Save Toshi use the same, or simliar 3-star system. However, the former allows the player to end the level with a zero-star ranking, and the latter allows players to get a three-star-plus ranking.
- Researchers found that before the release of the original Angry Birds, only 20% of all games were rated with the 3-star score system. After the release of it, nearly 80% of all games were rated with the same or similar scoring system. (Similars are the likes of Asphalt 6: Adrenaline and Asphalt 8: Airborne, which placing was rated with 3, and additional objectives were 2, meaning that this is a 5-star score system.)
- In the Angry Birds Board Games, there's a star piece.
- The star sounds in Angry Birds Space later replaced the original star sounds in the original Angry Birds starting in 2016/17.
- In Angry Birds Telepizza, pepperoni slices are awarded instead of stars.
- In Angry Birds Music, music notes are awarded instead of stars.
- Along with the stars, a new highscore appears with Red very happy in Angry Birds, Angry Birds Seasons, and Angry Birds Rio.
- In Angry Birds Epic, the same three stars are rewarded in the levels, but the three star formula is different in the Magic Anvil and the Golden Caludron. At first, you may roll the die which will give you only one star for regular, but if you upgrade the Magic Anvil and the Golden Caludron, you get more stars per roll. (example: One star for regular, two stars for golden, three stars for diamond) There is also a different formula in the Golden Pig Machine - if at any chance you roll the Golden Pig Machine, the Golden Pig Machine spits out a legendary item! If hit, it will show three rainbow-colored stars instead of the original three yellow stars, and it will show the description of how you can get another legendary item but either as a shield or a sword. A fanfare will also sound if a star is hit.
- In Angry Birds POP! it is possible to get zero stars in the level as long as the objective is completed.
- Most Angry Birds (slingshot games), two-star score is usually 10,000 points lower than three-star, makes the player getting only one star in most levels.
- It is impossible to fail if you already pop all the pigs in the level.
- In Angry Birds Reloaded, the stars have silhouettes of eggs on them, one egg per star.
- The stars were used for a "circling birds" gag twice in Angry Birds Toons; once in Chuck Time and again in Chucked Out.
Angry Birds Friends
You can get a star background your avatar in Angry Birds Friends. To get a bronze one, get 100 stars. To get a silver one, get 200. For a gold one, get 400. For diamond level(with a diamond), get 600.
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| Main article | Gallery | Beta elements | Credits | Glitches | Version history | Achievements | Re-releases (Free, HD) | |||
| Playable characters | King Pig | Ross | ||
| Non-playable characters | Ancient Pig | Bomb | Chef Pig | Foreman Pig | Corporal Pig | Major Lazer | Mechanic Pig | Minion Pig | Zombie Pig | Hand* | ||
| Enemies | The Flock (The Blues, Chuck, Red, Bomb) | ||
| Episodes | Normal | Ground Hog Day | Rise and Swine | When Pigs Fly | Flight in the Night | Tusk 'til Dawn | The Road to El Porkado | Road Hogs | |
| Sandboxes | Sandbox | Find the Skulls | Find the Statues | Little Pig Adventure | Field of Dreams | ||
| Items | Vehicle parts | Balloon | Bellow | Boxing Glove | Detacher | Dynamite | Egg | Fan | Firework | Frame | Gearbox | Golden Pig Statue | Grappling Hook | Helicopter Rotor | Lamp | Motor | Propeller | Pumpkin | Rope | Sandbag | Soda Bottle | Spotlight | Spring | TNT | Umbrella | Wheel | Wing | |
| Other | Cake | Custom Contraption | Loot crate | Power-up (Turbo Charge, Super Magnet, Super Glue, Super Mechanic, Night Vision) | Scrap | Scrap Machine | Skull | Slingshot | Snout Coins | Star Box | ||
| Modes | Cake Race | Dessert Mode | ||
| Music | Albums | Bad Piggies (Original Game Soundtrack) | |
| Songs | "Shuffle and Spawn" | ||
| Other | "Bad Piggies Cinematic Trailer" | Bad Piggies comic | "Celebrating 1 year of Bad Piggies!" | Angry Birds episode | Piggy Island (Piggy kingdom (Pig City (Pig Palace))) | "Fly Piggy, Fly!" | Star | Sub-Series | ||
| *Appears in the PC version | |||
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| Main | Main article · Gallery · Beta elements · Credits · Glitches · Version history · Achievements |
| Playable characters | Stella · Poppy · Luca · Willow · Dahlia · Gale |
| Enemies | Big Pig · Boom Pig · Cursed Pig · Handsome Pig · Helipig · Jetpack Pig · Minion Pig · Muscle Pig · Necromancer Pig · Ninja Pig · Space Pig · Trainer Pig |
| Chapters | Branch Out · Beach Day |
| Gimmicks and obstacles | Anti-Gravity Box · Box of Coins · Drum · Explosive Fruit Box · Geyser Box · Glass · Gold flower · Pig in a Box · Stone · Trampoline · Vortex Box · Wood |
| Items | Coin · Hammer · Slingshot |
| Music | Angry Birds Stella (Original Game Soundtrack) |
| Other media | Angry Birds Stella Comic-Con Trailer · Angry Birds Stella Diaries (Stella Runs Away! · Poppy's Perfect Prank · Willow Takes the Stage · Luca's Lost Voice · Gale Has a Ball · Dahlia and The Ultimate Invention) · Angry Birds Stella Super Interactive Annual 2015 · Stella: Nana and the Magic English Words |
| Miscellaneous | Angry Birds Stella Launcher · Golden Island (Big Tree · Gale's Castle) · Golden Island map · Level Failed · Scrapbook · Star · Telepods |
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| Protagonists | Red (Super Red • Christmas Red • Phantom Bird) • The Blues • Chuck • Matilda • Stella • Bomb • Terence • Hatchlings (Samantha • Vincent • Zoe) • Silver • Piggy McCool • Zeta • Shakira • Dahlia • Luca • Gale • Willow • Poppy • Critters (Bee) | ||||||||
| Antagonists | King Pig (Former: Gale) • Minion Pigs • Zeta (Former) • Pilot Pig • Billy The Piglet • Mad Hog Mccree • Hams Grubber • Captain Cold Cut • The Jester • Oink the Odious | ||||||||
| Blockers and Materials | Slingshot • Bubble • Glass • Wood • Stone • Blitzfruit • Smoke Cloud • Splash Fruit • Fruit Bomb • Honeycomb • Lava Bubble • Ash Bubble • Bubble Pod • Picker Pod • Boomshroom • Spores • Pop Fruit • Power Flower • Sandstorm • Spike • Splash Flower • Drums • Fizz Fruit • Spin Fruit | ||||||||
| Blockers | Bird Boost (Power Pop • Science Pop • Splash Pop • Line Pop • Rock Pop • Triple Threat • Color Pop • Love Pop • Blast Pop • Sonic Pop • Splash Pop • Prize Pop • Royal Pop • Smash Pop • Plunder Pop • Star Pop • Freeze Pop) • Rainbow Bubble• Mighty Eye Sight • Fireball • Crusher • Instant Bird Boost • Color Crush • Mystery Boost | ||||||||
| Episodes |
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| Other | Achievements • The Sequel • Gold • Stars • Golden Feathers • Gallery • Glitches • Unused Content • Version History • Level Failed | ||||||||
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| Main article | Gallery | Beta elements | Version history | Achievements | Credits | Glitches | Pre-releases (Countdown) | Re-releases (Create, Turbo Edition) | |||
| Playable characters | Red | Bomb | Stella | Bubbles | Matilda | Foreman Pig | King Pig | The Blues | Terence | Hal | Corporal Pig | Chuck | Ayrton Senna* | Chronicler Pig*** | Ice Bird*** | ||
| Non-playable characters | Chronicler Pig* | Mechanic Pig* | Minion Pigs | ||
| Tracks | Seedway | Sub Zero | Air | Rocky Road | Stunt | Weekly Tournament | Jenga | ||
| Vehicles | Air Guita | Arctic Roller | Barbequick | Barrel Roller | Beach Buggy | Big Boomer | Big Burner | Blue Cornet | Capster | Cool Runner | Cork Wagon | Drum Roller | Ham Glider | Hog Rod | Iron Belt | Matchstick Mobile | Music Maker | Phoenix Star | Pinky Tonk | Point Breaker | Punch Box | Rocket Racer | Royal Snout | Semi-Skinner | Shred Sled | Snow Scoop | Sponge Cruiser | Strike Out | Sty GT | Tar Barreller | Tracked Trekker | Trash Thrasher | Tub Thumper | Woodwind | ||
| Items | Bird Coins | Blueprint** | Booster (Boost*, Kart Repair*, King Sling, Target Kart*) | Gems | Ticket** | Toolbox** | ||
| Gimmicks and obstacles | Glass | Stone | TNT | Wood | ||
| Music | Albums | Angry Birds Go (Original Game Soundtrack) | |
| Songs | "Songbird" | ||
| Other | Earth (Piggy Island) | Level Failed | Star | Telepods | Rovio Account | Cancelled sequel | ||
| *Appears in the 1.0.0 version only **Appears in the 2.0.0 version only ***Unused | |||
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| Main article | Gallery | Beta elements | Version history | Achievements | Credits | Glitches | Re-releases (Lite, Free, HD, Free HD, Premium) | |||
| Playable characters | Angry Birds (Space Flock), Bomb (Space Bomb), Bubbles (Atomic Bird), Chuck (Lazer Bird) (Space Yellow Bird*), Ice Bird, Red (Super Red), Terence (The Incredible Terence, Wingman), The Blues (Lightning Birds) | Blackhole Bird* | Drill Bird* | Space Egg | ||
| Non-playable characters | Darth Maul | Hand*** | Lightbulb Pig | Mighty Eagle (Mighty Buzzard, Space Eagle) | Space Sheep | Slash Bird | Skunkbird | Tinfoil Hat Pig | Toucan Sam | Toucan Sam's Nephews | Zigzag Antenna Pig | ||
| Enemies | Space Pigs (Corporal Pig, Foreman Pig, Hektor Porko, Minion Pig, King Pig, Alien Pig, Fat Pig) | Spacecraft Pig | S.P.A.R.K. | ||
| Episodes | Pig Bang | Cold Cuts | Fry Me to the Moon | Utopia | Red Planet | Pig Dipper | Cosmic Crystals | Beak Impact | Brass Hogs | Solar System | Eggsteroids | Danger Zone | Froot Loops Bloopers** | ||
| Modes | Daily Missions | Level Editor | Mirror Worlds | ||
| Bosses | King Pig's UFO Tank | The Claw (Cold Cuts) | Big Bork Fat Pig | Curiosity Rover | King Pig's UFO Submarine | Alien Pig's UFO | The Claw (Beak Impact 1) | The Claw (Beak Impact 2) | King Pig's Brass Hogs Fortress | ||
| Items | Egg | Eggsteroid | Nest | Powerup (Flock of Birds, Pig Puffer, Space Egg, Wingman) | Slingshot | Space Egg Cannon | The Claw | ||
| Gimmicks and obstacles | Glass | Stone | TNT | Water | Wood | ||
| Music | Angry Birds Space (Original Game Soundtrack) | Angry Birds Space (Original Game Soundtrack), Pt. 2 | ||
| Other | Angry Birds Comics (2016) #9 | Angry Birds Space: A Furious Flight into the Final Frontier | Angry Birds: Birds in Space | Angry Birds Space: Planet Block | Angry Birds Space comic | Angry Birds Space VR | Angry Birds Space: Colors | Angry Birds Space: Numbers | Angry Birds Space: Maze Mania | Learn to Draw: Angry Birds Space | Angry Birds Space Joke Book | Angry Birds Space: Search and Find | Angry Birds Friends Golden Egg Level 10 | The Daily - Birds in Space | Destruction gauge | Earth (Piggy Island) | Star | Angry Birds Space Assault! | Angry Birds: Hatching a Universe | Winnable Objects | Rocket Science Show | ||
| *Appears in the Prototype version only **Limited Time ***Appears in the PC version only | |||
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| Playable characters |
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| Non-playable characters | Hand* | Hatchlings | Mighty Eagle | Postman Pig | Jo | Sonic the Hedgehog | Shadow the Hedgehog | Tom | |||||
| Enemies | Minion Pigs (Special pigs (Corporal Pig | Golden Pig)) | |||||
| Bosses | Chef Pig | Foreman Pig | King Pig | Zeta | Dr. Eggman | |||||
| Locations | Cobalt Plateaus | Pig City | Bamboo Forest | Mount Pork | Space | |||||
| Items | Apple | Arena Coins | Arena tickets | Black Pearls | Bonus Stamps | Chests | Eggs | Energy | Event Coins | Feathers | Gems | Hats | Lives | Mighty Eagle Coins | Slingshot | Spell (Blizzard, Chili, Golden Duck, Mighty Eagle, Pig Inflator, Sponsored Spells) | |||||
| Gimmicks and obstacles | Bumper | Balloon | Destruct-O-Meter | Fan | Flock Power | Glass | Lava | Portal | Rocket | Spitting Flower | Stone | TNT | Water | Wood | |||||
| Activities | Arena | Clans | Daily Challenge | Feather Quest | Jetpack Run | Mighty Eagle's Bootcamp | Rowdy Rumble! | Tower of Fortune | Treasure Pass | |||||
| Albums | Angry Birds 2 (Original Game Soundtrack) | |||||
| Other | Angry Birds 2 Creators | Flock Forward | Earth (Piggy Island (Bamboo Forest, Cobalt Plateaus, Pig City)) | Star | Level Failed | Gallery | Beta elements | Credits | Glitches | Chapters | |||||
| Note | * - Appears in the PC version only | |||||
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| Playable characters | Angry Birds (Bomb, Chuck, Red, The Blues) | |||||
| Enemies | Dr. Frankenswine · Minion Pigs | |||||
| Episodes |
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| Items | Slingshot | |||||
| Gimmicks and obstacles | Glass · Stone · TNT · Wood | |||||
| Modes | Level Builder | |||||
| Others | Gameplay · Characters · Gallery · Version History · Achievements · Unused Content · Episodes · Destruction gauge · Earth (Bird Island (Bird Island Beach, Eagle Mountain), Piggy Island) · Level Failed · Piggy kingdom | |||||
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| Main article | Gallery | Version history | Achievements | Credits | Glitches | |||
| Playable characters | Angry Birds ((Space Flock), Bomb (Space Bomb), Bubbles (Cosmic Bubbles), Chuck (Lazer Bird), Hal, Ice Bird, Matilda (Iron Bird), Red (Super Red), Silver, Stella, Terence (The Incredible Terence, Wingman), The Blues (Lightning Birds), Tony) | Belchy Pig | Boom Pig | Garry | Harvey (Courtney) | Jetpack Pig | Leonard | Space Egg | ||
| Non-playable characters | Birdie | Chef Pig | Daft Piggies | Mighty Eagle (Mighty Buzzard, Space Eagle) | ||
| Enemies | Corporal Pig | Eagles | Evil Duck | Foreman Pig | Leonard | Minion Pigs (Construction Pig) | Space Pigs (Alien Pig, Fat Pig, Hektor Porko, Puffed Pig, Radioactive Pig) | Scarecrow Pigs | Spacecraft Pig | S.P.A.R.K. | Zeta | ||
| Episodes | Bird Island/Piggy Island | Hot Pursuit | When Birds Fly | Party Crashers | Bacon Beach | Bamboom Forest | Wrecks & The City | Pigs In A Banquet | Piglantis | |
| Eagle Island | Frenemies | Enter The Volcano | The Frozen Heart | Birdnapped | Finding Zeta | ||
| Secret Area | Off The Menu | Pie Hard | Daft Piggies | Midsummer Mayham | Moon Festival | Ham'o'ween | Ham'o'ween 2 | Pie Hard 2 | The Swine and Dine Tour | Snowball Showdown | Midsummer Mayham 2 | Ham-Mock Time | A Tweet in the Night | Flock to the Future | Ragnahog | Beak My Valentine | Sowhenge | ||
| Space | Pig Bang | Cold Cuts | Fry Me to the Moon | Utopia | Red Planet | Pig Dipper | Cosmic Crystals | Beak Impact | Brass Hogs | Solar System | Eggspansion Theory | Danger Zone | ||
| Carnival | Abra-Ca-Bacon | Space Hog | ||
| Other | Golden Eggs | Frost Festival | Egg Hunt | ||
| Modes | Competition | Mirror Worlds | ||
| Items | Accessories | Billy | Bird Coins | Egg | Eggsteroid | Power-Ups (Birdquake, Boombox, Flock of Birds, King Sling, Pig Puffer, Power Potion, Sling Scope, Space Egg, Wingman) | Sardine | Slingshot | Space Egg Cannon | The Claw | The Eggs | ||
| Gimmicks and obstacles | Balloon | Billy | Cake | Dice | Donut | Easter Egg | Glass | Greek pillar | Ghost Bricks | Gravity Field | Grey block | Iron | Lava | Portal | Pumpkin | Rubber | Stone | TNT | Treasure chest | Water | Wood | ||
| Other | Earth (Bird Island, Eagle Island, Piggy Island (Cobalt Plateaus, Bamboo Forest, South Beach, Pig City) | Level Failed | Piggy kingdom | Star | Carnival | Red's Holiday Calendar | ||
v • e  | |
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| Playable characters | Angry Birds (Bomb, Chuck, Matilda, Red, Stella, Terence) |
| Non-playable characters | Hatchlings (Ariana, The Blues, Samantha, Vincent, Will, Zoe) · Hug Trader · Mighty Eagle · Monica · Shirley |
| Enemies | Corporal Pig · Foreman Pig · Leonard · Minion Pigs (Lollipop Fan Pig, Ninja Pig, Sneezing Pig, Shooter Pig, Marshmallow Pig, Relaxing Pig, Cardboard Box Pig, Scout Pig, Sign Holding Pig, Fart Pig, TNT Pig, Boxer Pig, Ice Pig) |
| Items | Slingshot |
| Gimmicks and obstacles | Glass · Stone · TNT · Wood |
| Modes |  · 
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| Others | Gallery · Minecraft · Earth (Bird Island (Camp Splinterwood, Bird Island Beach, Eagle Mountain), Piggy Island) · Star · Piggy kingdom |