1) MacOS game 2) Windows game 
Antichamber (originally known as Hazard: The Journey of Life) is a single-player first-person puzzle-platform video game developed by Alexander Bruce. Many of the puzzles are based on phenomena that occur within the Non-Euclidean geometry created by the game engine, such as passages that lead the player to different locations depending on which wa...
• (n.) See Antechamber.
An'ti·cham`ber noun [ Obsolete] See Antechamber .