Frictional Games

Penumbra: Overture

Penumbra: Overture is a first person action/adventure game from Frictional Games and Strategy First. You play as an individual named Phillip, who has received a letter from his deceased father, asking him to destroy a set of notes. Instead of doing so, he reads the notes, and travels to an abandoned iron mine in Greenland to follow the clues in the notes. Penumbra: Overture has a physics based engine, and features lots of sophisticated physics-based puzzles, much more so than in Half-Life 2. Nearly every object can be grabbed, pushed, pulled, dragged, thrown, and/or otherwise manipulated.

Amnesia: Rebirth

Amnesia: Rebirth is a first-person survival horror game by Frictional Games, developed on their proprietary HPL Engine.

SOMA

Torontonian gets brain scan, becomes last hope for mankind. Soma is a horrific first-person adventure which relies more on its impressive setting and powerful story than jump scares or constant hiding to convey a sense of solitude and urgency. Like Amnesia: The Dark Descent, the game is open for modding from the get-go.

Amnesia: The Dark Descent

Amnesia: The Dark Descent is a 2010 slow-burn survival/horror game with puzzle elements, developed and published by Frictional Games on their custom HPL Engine 2 (Penumbra used HPL1, Amnesia uses 2, Soma uses 3, and Amnesia Rebirth 3.5)

Penumbra: Black Plague

This stealth/adventure game series was developed by Frictional Games. There are things I need of you. Things you may not understand, and may not wish to do, but please, do not make the same mistakes I did. My father, Howard, sent me a letter last year that led me into all this. To think that such a small event can change your life in such a violent way. Without this knowledge, without this foundation, you could not have the will to do what I must now ask of you.