Here’s how to unlock the secret level in Angry Birds “Ham ‘Em High” for the Android and iOS users. The hint was included in Rio’s (the movie’s) commercial during the Super Bowl. Here the steps that you need to take to unlock the secret, Super Bowl level:

1) Load up level 13-12 in “Ham ‘Em High.”
2) Shoot the first yellow bird.
3) Then shoot the white bird backwards and drop an egg on the back side of the hill.
4) Hitting the right spot will make a golden egg appear.

Completing the secret Super Bowl level will give you an egg with the text “Rio” it, which is most likely a hint at Rovio’s latest project “Rio! Angry Birds!”

Here the video walkthrough provided by scarbzscope on Youtube: