Bad Piggies by Rovio

Easily the biggest release of the month happened just Thursday, with Rovio's much-anticipated spin-off to Angry Birds. Bad Piggies tasks the player with creating modular vehicles to reach the end of the stage, with such wacky propulsion as bellows, flapping umbrellas, Coke and Mentos, and boring old-fashioned stuff like engines. It'll rack up millions of downloads however good it is, but in the review yours truly found it to be pretty fun and challenging, despite a general lack of polish. Downloads of the standard and HD version are free, supported by ads and in-app payments.

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Get ready to see pigs fly. From the creators of Angry Birds: an all new game from the PIGS’ point of view. Create the ultimate flying/crawling/rolling/spinning/crashing device and pilot the pigs safely to the eggs. The Bad Piggies are after the eggs again -- but as usual, nothing is going according to plan. Can you create the ultimate flying machine and steer them safely to their destination? Those tricky pigs have a few objects they can use, but they need your help to turn these into the perfect transportation.