Company name: Sorrent
Where it's based: San Mateo, Calif.
When it was founded: 2001
What year it was a Fierce 15: 2003

Why it was a Fierce 15: A mobile game developer, Sorrent was selected for its ability to combine slick graphics and cool game play on mobile devices. The company's open, layered architecture handled everything from WAP to J2ME to BREW. Click here for more.

What has happened since it was awarded the Fierce 15: In 2005 Sorrent acquired European game publisher Macrospace and rebranded itself as Glu Mobile. In March 2007, Glu raised $84 million in an initial public offering. The firm continues to be one of the few independent mobile game makers in the marketplace. Today it has more than 500 employees and four development studios around the world. The company supports more than 1,000 handsets on more than 165 carriers and other distribution partners in 65 countries. In August 2009, Glu re-aligned itself to focus about 30 percent of its resources on the high-end device market. The company has introduced 11 titles for the iPhone and iPod touch. Recently its long-time CEO Greg Ballard resigned.