Last night's blockbuster football contest might not have featured the most hee-larious advertisements in all of Super Bowl history -- but you can't say they weren't rewarding. Take, for instance, the trailer for 20th Century Fox's Rio, which featured a split-second image of one of the avian protagonists of Angry Birds, as well as the numbers "13-12." A few of the game's more dedicated players have cracked that riddle -- firing off the birds in a specific sequence and direction on said stage unlocks a special, Super Bowl-themed level, provided you've updated to the most recent version of the game.
Check out a video after the jump to see how the bird-firing maneuver is properly executed. Also, we'd like to see more video game easter eggs in television commercials, please. Trust us, ad executives, it's good for you too -- we must have watched that freaking Rio commercial like, twenty times now.
The survival of the Angry Birds is at stake. Dish out revenge on the green pigs who stole the Bird's eggs. Use the unique destructive powers of the Angry Birds to lay waste to the pig's fortified castles. Angry Birds features hours of gameplay, challenging physics-based castle demolition, and lots of replay value. Each of the 165 levels requires logic, skill, and brute force to crush the enemy.