Angry Birds celebrates its 2nd birthday!

Angry Birds is celebrating its 2nd birthday today with Rovio giving out a free upgrade for iOS that includes 15 new birthday cake themed levels and this release also unlocks all the episodes.

In addition, customers at Barnes & Noble locations earlier today were able to take part in some various special events such as scavenger hunts, high-score contests, designing Angry Birds characters, parades and guessing games while customers at Toys ‘R’ Us can received discounts on Angry Birds plush toys and received a code that unlocks a bonus level in Angry Birds Chrome “Seasons Greedings” bonus level.

Source: Angry Birds via Mashable

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