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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. HPL1 contains the documentation for Penumbra: Overture, Penumbra: Black Plague and Penumbra: Requiem HPL2 contains the documentation for Amnesia – The Dark Descent and Amnesia – A Machine For Pigs HPL3 contains the documentation for SOMA and Amnesia: Rebirth 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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