Analytics firm Flurry said that 68 percent of mobile games sessions during the first quarter of 2012 are for products from independent developers who originated writing games for Android and iOS, rather than established companies which added the mobile platforms to their roster.

The figure compares with 56 percent reach for indie games in the first quarter of 2011, and 60 percent in Q1 2010. The dip early last year was attributed to consolidation, when a number of established players acquired mobile-focused independents (including EA/Chillingo, Zynga/Newtoy, DeNA/Ngmoco).

Flurry said that the entry of Apple and Google into the mobile gaming market changed the economics of the industry dramatically, “arguably creating the most open, egalitarian market in the history of video games.” It noted that while indie developers might have been expected to thrive initially, “it’s remarkable that their dominance has grown over the last several years, with no signs of slowing.”

Due to the changed economics involved, Flurry said that “the reduced importance of brand power in mobile app gaming allows indie developers to continue to innovate and capture increasing consumer mind share.”

According to the company, 52 percent of app sessions it tracks are games, making the strength of the indie developers even more notable. It also noted the number of gaming sessions increased by 5.3 times between the first quarter of 2010 and Q1 2011, and 20.5 times between the first quarter of 2011 and Q1 2012.

The company said that during January and February 2012, it monitored 64 billion app sessions, across more than 500 million iOS and Android devices.