Seriously, a mobile-first entertainment startup founded by former Rovio execs, has launched its first product, Best Fiends.

The Santa Monica game studio launched last year with the mission to create games that feel like Hollywood movies. It has since raised $5 million in financing primarily from Upfront Ventures, Sunstone Capital and Daher Capital. The startup also has a development team in Helsinki.

Chief Executive Andrew Stalbow and Chief Creative Officer Petri Järvilehto co-founded Seriously after working together at Rovio Entertainment, the company behind the wildly popular Angry Birds franchise. Stalbow helped broker key Angry Birds partnerships, including one with Lucasfilm to create Angry Birds Star Wars.

Best Fiends is a free iOS puzzle game framed in an adventure narrative, with in-app purchases. A trilogy is already in the works with a second edition debuting next year.

“A lot of great big brands have been made on sight and sound, and what’s quite exciting for mobile is that a lot of these brands are going to be built on sight and sound and touch,” Stalbow said.

Staff reporter Melissah Yang can be reached at Follow her on Twitter @MelissahYang for the latest in L.A. tech news.

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