Bad Piggies is $0.99 in the iOS App Store.
The app is free in the Google Play Store (along with a Bad Piggies HD version) but it is ad-supported. It's unclear at the time of this writing how many downloads have occurred, as that statistic has not been updated, but it's clear the app is well-regarded: the non-HD version, for one, has over 3,500 ratings and a 4.7-star average.
In Bad Piggies, instead of shooting Angry Birds at constructions of the Pigs in an attempt to destroy them, players need to construct vehicles to get the Pigs through the map level.
Petri Järvilehto, Rovio's executive vice president of games, said the following in a statement:
"We've never done anything like this. Where Angry Birds was all about destruction, Bad Piggies is all about the joy of construction. It's not just about getting three stars — in this game, failing is almost as much fun as succeeding!"
Think of it as Wile E. Coyote makes Angry Birds, or perhaps Rube Goldberg.
Bad Piggies includes more than 60 levels and - just as with Angry Birds - end users can expect free updates in the future. Rovio's statement promised hours of "pig-crashing, exploding, and flying fun."
In addition, users can unlock an additional 30 levels by getting three stars on levels, and there are four "sandbox" levels that the company says will allow players to "stretch their creativity to the utmost."
There is also an ultra-special, ultra-secret, ultra-difficult sandbox level to unlock by collecting all the skulls in the game. To create the ultimate egg-stealing machine for your pigs, you have 33 different parts: motors, wings, fans, bottle rockets, umbrellas, balloons, and much more.
There is also a mechanic pig that can be purchased in-game to help you when you are stuck.
The pigs have never starred in a game before, but Rovio said "it's just the beginning of a series of Bad Piggies related games and other entertainment." In addition, Rovio has said it will release a version for Windows Phone "soon."