On the eve of one of the biggest sporting events in the world, one of the most popular Android Games on Earth, has received another update. The Angry Birds update brings a new episode entitled “Ham ‘Em High,” an old western themed section containing a total of 45 new levels, 30 of which are playable today, with another 15 labeled “coming soon.” The new version also contains a graphics toggle, which allows for better gameplay on lower-end Android devices.

Also included in the update is a hidden level, which can be unlocked during the Super Bowl with a hint given to you while watching the Rovio commercial airing sometime during the game. For a sneak peak at the hidden level, check out this preview by Entertainment Weekly.

So head on over to the market and download version 1.5.1 of the Angry Birds application. And if you aren’t already planning on it, you might want to keep your eyes glued to the TV during the Super Bowl tomorrow afternoon to unlock the hidden Angry Birds Rio level.