Angry Birds Transformers generated characters to assist in a level for a limited time. Coins may be collected either during runs, popping pigs and/or simply by waiting and collecting coins that generate over time from freed areas. Some levels or features can be only unlocked when the player has upgraded enough Transformers to level 15. The game is the fourth game in the franchise to be compatible with Angry Birds' Telepods, a toy line that is also used in other "Angry Birds" games such as: "Angry Birds Star Wars II", "Angry Birds Go", and "Angry Birds Stella". When using Telepods, it can summon
Angry Birds (video game) by critics for its success for leveraging a combination of addictive gameplay, comical style, and low price into a viable franchise with long-term potential for profit. The game's popularity has led to the production of additional versions of "Angry Birds" for personal computers and gaming consoles, as well as a market for merchandise featuring its characters, a feature film and several seasons of television cartoons. With the "Angry Birds" series having a combined tally of over 2 billion downloads across all platforms as of January 2014, including both regular and special editions, the game was called "one of the most