Main Page

From Frictional Wiki
Revision as of 15:40, 23 August 2020 by TiMan (talk | contribs)
Jump to navigation Jump to search

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 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 logo.png   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.


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.


The third version of the engine was used to create SOMA. A modified version of HPL3 is used to create Amnesia: Rebirth, often referred to as HPL3.5. You can find extensive documentation about the engine and the games below, including downloads for various modding tools and tutorials on how to create your own mods.



Hpl1 logo.png


Hpl1 logo.png
Hpl2 logo.png
Hpl3 logo.png

Community Content