Evelyn M. Rusli, for the New York Times:

Several start-ups have also rebuffed Zynga this year, including Rovio. This summer, Rovio, the maker of the popular mobile game Angry Birds, walked away from discussions of a deal worth roughly $2.25 billion in cash and stock, three people briefed on the situation said.

Zynga is the social game developer behind Facebook hits like FarmVille. The company is preparing for an Initial Public Offering (IPO) of stock, and many expect that there will be an exodus of talent from the company after employees who get big stock option packages are able to convert those options into cash.