Successfully complete The Gauntlet level to unlock the extreme difficulty setting.

Only by this way that you can unlock the next level.

Angry Birds: How to Unlock the Super Bowl Golden Egg

If you are able to do so, you will unlock the new level.

In between every level, there is something you have to do in order to unlock the next level.

You must get at least a bronze star to unlock the next level.

If you receive 2 or 3 stars next level will unlock.

At least two stars are needed to unlock the next level.

If you get the first bike to unlock the next level of play.

We will reduce the amount of time it takes to unlock the upper level of the Atlas.

Win a bronze trophy at least to unlock next level.

You must accumulate enough points in order to unlock the next tier.

You must get at least a bronze star to unlock the next level.

You have to complete the first level to unlock the second level and so on.

You need to advance in this first level in order to unlock the following level.