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Frictional Games Wiki

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.

Note icon.png 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 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 was used to create the Penumbra series. This version is open-source and licensed under GPL, and can be used to create non-commercial projects, but documentation is rather limited.
  • HPL2 was used to create Amnesia – The Dark Descent. A modified version of HPL2 was used to create Amnesia – A Machine For Pigs, often referred to as HPL2.5.
  • HPL3 was used to create SOMA. A modified version of HPL3 is used to create Amnesia: Rebirth, often referred to as HPL3.5.


HPL Engine Documentation

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Hpl2-logo-minimal.png
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Community & Useful Links