Bring the Anger

Bring the Anger (also known as #BringTheAnger) was a promotional event organized by Droga5 that lasted from mid-November to the end of December of 2019 to celebrate the 10 year anniversary of the first Angry Birds game.

UNICEF
The partnership with UNICEF (United Nations International Children's Emergency Fund) was an event in Angry Birds 2 that started on November 12th where the player base had to reach 10 million pigs popped by December 1st for Rovio to donate $100,000 USD to the organization. This event also ran in mid 2021 again at the same goal.

Rage Rider
The Rage Rider was an electric scooter that activated by the sound of the user's voice, so screaming was a must. Manufactured by Spin, there were only 100 made and were given to internet celebrities such as Dude Perfect, Mr. Beast, Tanner Fox and more. It is estimated that Rovio has kept at least 5 in their possessions throughout their studios.

Venting Machine
The Venting Machine (play-on-words for "Vending Machine") was a promotional event made by 10xBeta labs and held in Time Square, NYC on November 21th, 2019 that had special guest and former WWE Wrestler "Big Show" demonstrating the use of the machine. When a participant punches and shakes the machine enough, the red LED's in the padding light up in random patters and the machine would give the user a special gift, which are stress reliever toys. This event was believed to last a single day however.

Other Information

 * An Angry Birds Friends tournament called the "10th Anniversary Tournament" was also going on during this time to promote the event.
 * A special event in Angry Birds Match was released with different outfits for the hatchlings.
 * New events appeared in Angry Birds POP! where the player would collect "Classic Bird" tokens for powerups and other items. There were also "Classic Pigs" that invaded the game as well.
 * Influencers such as Eva Gutowski, Deestroying, Tanner Fox, Shonduras, Team Edge and Lexi Hensler competed in a private "Bring the Anger" go kart race around November 27th, 2019 to support the $100k donation to UNICEF.

UNICEF

 * https://www.unicef.fi/angrybirds/
 * https://mashable.com/article/angry-birds-10th-anniversary-event-details
 * https://www.facebook.com/angrybirds/photos/we-did-it-you-did-it-together-weve-crushed-the-angry-birds-2-piggy-popping-goal-/10157924023019928/
 * https://www.facebook.com/110127927077735/posts/angry-birds-2-supports-unicef-join-the-bring-the-anger-event-starting-november-1/130574118366449/

Rage Rider

 * https://www.adweek.com/brand-marketing/angry-birds-anger-powered-scooter-10th-anniversary/
 * https://www.campaignlive.com/article/angry-birds-invents-rage-powered-scooter-2019-not-ready/1665536

Venting Machine

 * https://twitter.com/angry_facts/status/1380175824893136900
 * https://twitter.com/engadget/status/1196806440725417987
 * https://twitter.com/AngryBirds/status/1196806833282920448
 * https://twitter.com/i/events/1197710806412091393
 * https://hypebeast.com/2019/11/angry-birds-rovio-droga5-venting-machine-info