Second edition, 2009 Update--now includes documentation for Playground 4.0.17, and extensive tools documentation. And we've cut the price!
A reference manual and user guide for the Playground SDKª, a free cross-platform C++ and Lua development environment for casual/popular games.
The framework provides all the technology you need to develop high quality casual games poised to maximize their market opportunity. Now anyone can build a game on Playground SDK. PlayFirst has opened access to its popular framework with one goal in mind: to continue to grow the market for casual games.