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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. Please read our General Disclaimers before contributing to the wiki. HPL Engine The wiki provides documentation for the HPL Engine, Frictional Games' in-house game engine. The engine currently has three major iterations available, and a fourth iteration under development. Technical information about using the engine and all of the related tools can be found in their respective sections: 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 HPL1 Engine documentation HPL2 Engine documentation HPL3 Engine documentation Community Content Browse Amnesia: The Dark Descent Mods Browse SOMA Mods Browse Amnesia: Rebirth Mods  Visit Frictional Games