Frictional Games' HPL1 engine used to create the Penumbra series.

Mendozacheers says

9/10 - Agree Disagree

A bit weird engine, the Penumbra series is using it as well as Amnesia. They are all awesome first-person horror/puzzle games that I love, I guess the engine is good, not perfect. But it's Indie so... Oh and it's apparently open-source, cool!

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