Angry Birds Classic is the first Angry Birds game to be released and it got a lot of unused content as seen below.
Red's Mighty Feathers Part 3In the files of the game, there are two unused sprite sheets for a third part of Red's Mighty Feathers as both of them are label as "SEING RED". The first sprite sheet includes sprites of pigs with scubas and deep-sea diving suits. One of them is with their original design, which is with the deep-sea diving suit and others with the Chrome design which are with scubas.
There are also air tanks, duck feet, a lily, a mushroom, cave helmets, (Which are unused designs of the ones found in Mine and Dine. There are also two more sprites from the same episode on the sheet) and grass forms.The other sprite sheet includes sprites of Red using his ability and getting wet, as well as sprites of feathers and water effects. This strongly suggests that part 3 would introduce water in the game.
LeonardThere are some sprites of Leonard that were never used in-game, such as sleeping, sweating, crying, cheerful and other beta sprites. In fact, it's an edited sheet of King Pig.
In the files, there is a sprite for a button of the episode Year Of The Goat that is not used in the game and was probably meant to be released on the start of 2015, since this was the latest Year Of The Goat and it uses the Classic Designs. While not used in the game, a Chinese Version of Angry Birds Classic features this episode fully playable.
In the files, there is a sprite for a button of the episode Moon Festival that is not used in the game and was probably meant to be released probably on the same year, since Moon Festival's button is in the same assets as the Year Of The Goat and it uses the Classic Designs or on 2016, 2017 or 2018, because it's also in the same assets as Bird Island and Tutorial. While not used in the game, a Chinese Version of Angry Birds Classic features this episode fully playable. It
There is an unused level in the game called StellaLevel (sic), which will refuse to load. The level would probably have featured Stella.
Bubbles's level, unlike Stella, is actually able to load properly. However, the level will always have a score of zero and the Slingshot is stuck under the ground. No Birds are included in the level either.
Design UpdateThere is an unused poster of a new update. It is a file with a poster that has a texture of buttons and a wood background.
There are 2 Chucks (Toons Design), 1 Bubbles, and 2 Minion Pigs (Toons Design). And it uses the background for the Red's Mighty Feathers levels. All of the characters use their Toons Designs. The sprites are very similar to Angry Birds Friends' new sprites and this could be a test for these sprites.
This poster was featured in the News tab (Paused Game Screen).
Tickets could be used in the Mighty League in order to play the levels and could be found in the Bird Island levels (Which were replaced by Shockwaves). But in recent updates, they don't appear anymore in the game. They were deleted to make the game fairer.
Some stickers were unused or retextured such as:
- One featured a defeated Hal in a rectangular form as an icon. To obtain this sticker, the player had to use a lot of birds. This sticker was retextured to Red using the Slingshot as an icon. The form of the sticker is now a star.
- One featured tickets in an oval form as an icon. To get this sticker, the player has to use a determined number of stickers. This was deleted because tickets are not used anymore.
In one of the Mighty League levels, there is a warning message saying that a sprite is missing. The name of the sprite is Snow_Cannon. It could be the Snow Cannon from the Angry Birds Friends Winter Tournaments. The message is the following;