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Seriously's Best Fiends mobile game is the addictive result of a one-night stand between Angry Birds and Candy Crush.

Finnish game studio Seriously, which offered a sneak peek at the animated title in August, today announced the worldwide launch of the puzzle game, available only for iOS devices.

Best Fiends was developed under the guidance of co-founders Andrew Stalbow and Petri Järvilehto-former executives from Angry Birds maker Rovio.

'At Seriously, our goal was to work with the world's best creative talent, and together, we have developed a game that is very unique and special,' Järvilehto said in a statement.

The first in a series, Best Fiends details the epic journey of a team of unlikely heroes, and their battle against the greedy Slugs of Mount Boom.

Described as 'mythical, mischievous little creatures inhabiting the world of Minutia,' the fiends grow up with each subsequent level, transforming, say, from a one-eyed critter to a 12-eyed beast.

And they're under attack by the Slugs: Once tucked away in the caverns of Mount Boom, the selfish creatures have been infused with super-slug powers by a fallen meteor.

Save the lands of Green Glades, Strawberry Patch, Mellow Flowers, Glowshroom Garden, and Dewdrop District by pitting unique characters against the slugs. Each level requires Candy Crush-like instincts to match symbols-leaves, mushrooms, droplets, etc.-in sequences of three or more. The more you snag at once, the more powerful the blow will be to the slimy foes.

'The story of Minutia and the cute yet fiendish creatures that inhabit it is something we've been passionate about developing for a long time,' Jarvilehto said. 'For us, this launch is the beginning of an incredible journey that will unfold through a trilogy of games.'

Best Fiends will be available for Android via Google Play and the Amazon AppStore before the holidays. The next installment, meanwhile, will hit smartphones and tablets sometime next year.

'The tried and true Hollywood model is to develop, produce and market a movie or television property, but the scale of mobile engagement is changing this formula,' Stalbow said. 'We believe that given the seismic audience shift to tablets and smartphones, the next generation of entertainment brands will be built on the power of touch.'

Today's launch comes with more than hours of mobile fun, though. Seriously is also releasing the music from Best Fiends, composed by Despicable Me songwriter Heitor Pereira and performed by the Budapest Art Orchestra, as well as an entire game-themed YouTube channel.

Visit the video site to watch a cinematic trailer introducing the animated world, the first five Best Fiends character reveals, a making-of film, a behind-the-music documentary, and a gameplay trailer (below).

And, in a twist on the usual game launch, Seriously also announced a partnership with the Malaria No More charity, in what the company said is 'an effort to help raise awareness to eradicate the preventable disease.'