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Welcome to the official Frictional Games Wiki. This wiki is a combined effort of the studio and the community, and is a constant work in progress. If you would like to contribute to the wiki, check out our help section.

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HPL Engine The wiki provides documentation for the HPL Engine, Frictional Games' in-house game engine. The engine currently has three major versions available, and a fourth version under development. Technical information about using the engine and all of the related tools can be found in this wiki. HPL Engine Documentation   The first version of the engine was used to create the Penumbra series. The engine is open-source and licensed under GPL, and can be used to create non-commercial projects, but documentation is rather limited.  HPL1 Engine documentation   The first version of the engine was used to create the Penumbra series. The engine is open-source and licensed under GPL, and can be used to create non-commercial projects, but documentation is rather limited.  HPL2 Engine documentation   The first version of the engine was used to create the Penumbra series. The engine is open-source and licensed under GPL, and can be used to create non-commercial projects, but documentation is rather limited.  HPL3 Engine documentation

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