SK181D1 EXPERIMENT is an analog horror game that takes players into the disturbing world of an inhuman experiment. You are tasked with testing a strange humanoid creature, a head protruding from a toilet, in an eerie and unsettling environment. Your role as the experimenter is to observe and evaluate the prototype’s reactions—deciding whether they are normal or abnormal based on the creature's responses.

As you navigate the experiment, the game presents various situations that test your moral judgment, patience, and understanding of the unknown being before you. The choices you make throughout the experiment shape the outcome, leading to two distinct endings. Each ending unveils different layers of the game’s dark and cryptic lore, shedding light on the true purpose behind this experiment and the nature of the creature.

The analog-horror style brings a retro VHS aesthetic, adding to the atmosphere of mystery and tension. Static effects, glitches, and unsettling visuals evoke a sense of dread, making you feel as though you are watching a lost, forbidden tape. The low-fi graphics, combined with eerie sound design, immerse you in a world where science has crossed the line into the grotesque.

The game’s mechanics are straightforward but impactful. Each test sequence requires you to make quick decisions as you monitor the subject’s reactions. Some choices may seem insignificant at first, but as the experiment progresses, the results of your decisions become more critical. Each interaction draws you closer to the disturbing truth behind the SK181D1 experiment.

With its unique setting, disturbing atmosphere, and interactive storytelling, SK181D1 EXPERIMENT challenges players to explore the ethical boundaries of experimentation and the unknown horrors lurking beneath the surface.