Angry Birds: Heat In Anger is a fan fiction game made by a secret user.
Fiery Bird - Shoots 10 fireballs in an exploding effect. All 10 fireballs revolve.
Ability Bird - Needs a click on a bird to activate it's ability that is copying the bird's ability.
Sharpshooter Bird - Speeds up in launch; fires 5 Black Birds from itself towards the nearest material which causes it to deflate.
Jet Bird - Speeds up and leaves a cloudy and fiery trail that burns the pigs it hits. Corpse retains the trail.
Cymbal Bird - Makes a big cymbal on the air, goes back and hits it, causing an earthquake.
Super-fiery Bird - Shoots fireballs (amount depends on how many pigs) toward all pigs.
Secret Bird - Unlocked by an Angry Birds: Heat In Anger plush toy's code. iPhone 4S detects it. Released in 1/4/12.
Detector Bird - Detects the nearest pig. Goes heavy and lands down, which makes an effect that makes a keyboard and a computer. The bird then turns into a Comm (from Club Penguin) and types, which throws snowballs at the detected pig.
Sensei Bird - Shoots a fireball, a water balloon and a snowball. Then scares pigs with a shadow. Similar to Sensei from Club Penguin (as elements were Fire, Water, Snow and Shadow).
1/1/12 - iPhone (Secret Bird is not made)
1/3/12 - iPad (Secret Bird unlocked within typing a code)
1/3/12 - iPhone 4S (Secret Bird unlocked by detecting code)
1/4/12 - iCloud (Secret Bird unlocked by paying 99 cents in a store that contains Payment Zone for Angry Birds: Heat In Anger)