Penumbra Overture Source Code
Yes, here it is at last the first game in the Penumbra Series.
Read through the TODO file for various known things that should be cleaned up / fixed.
Included are project files for Xcode, Visual Studio 2003 and Cmake (for Linux)
We encourage everyone to contribute code to this project, so just sign up for a github account, create a fork and hack away at the codebase. We will start an Open Source forum on the Frictional Games forums as a place to talk about changes and to submit patches from your forks.