Superliminal is a first-person puzzle game from Pillow Castle that centers on forced perspective and optical illusions. Players manipulate objects and their viewpoint to solve puzzles within a dreamscape, aiming to escape the subconscious. The game challenges players to think outside conventional spatial reasoning to progress through its narrative.The game features a fully-voiced narrative with Dr. Glenn Pierce and an AI assistant, exploring themes of perception and reality. Superliminal includes developer commentary detailing its creation and a Challenge Mode that scores players on speed and actions. Experimental Steam Workshop support allows users to import 3D objects for custom puzzle creation.