20 Doors

20 Doors is a first-person exploration, action and puzzle-solving adventure in which strange events and environments make you question your sanity. Lost and confused, you begin on a small makeshift pier, where thick, mucky sand and a sour smell that stings your eyes surround you. You move forward into the dark mist, exploring odd locations and facing untrustworthy things lurking in the shadows.

As you go deeper, you can investigate dark, misty forests and look behind moldy walls while seeking answers to the questions that arise, including whether something has been watching you. The game features global illumination, ambient occlusion and HDR support.