If you were paying attention to the Rio Ad in the 4th quarter of the 2011 Super Bowl between the Green Bay Packers and the Pittsburgh Steelers, you might have noticed the secret Angry Birds code behind the monkey on the wooden fence.
It read "13-12" and pictured a Red Angry Bird looking at a Golden Egg.
It turns out it's simply a code for Level 13-12 in Angry Birds. You just need to unlock the Golden Egg by shooting your white bird backwards. Check out the video below for a walk-through.
Step 1 Go to Level 13-12
From the Level Selection Screen, swipe over to the 5th collection of Levels called "Hang 'Em High". If you haven't gotten this far in the game yet, you've yourself got some Pig Smashing to do to catch up!
Just tap Level 12 in the Hang 'Em High Section to get to the level.
Step 2 Throw the first Yellow Bird Anywhere
Step 3 Throw the White Bird Backwards
Step 4 Tap to Drop the White Bird's Bomb JUST Before Going Off-Screen
You want it to hit just behind the little bump, launching the white bird straight up into the air.
Step 5 Wait for the White Bird to Fall Back Down on the Other White Bird
This will unlock the Golden Football to get you into the Secret Rio Level!
Step 6 To Get To The New Level, Go To The Golden Eggs Level Selector
Step 7 Swipe to the 2nd Page and Tap the Golden Football