6F: NIGHT SCHOOL LOOP∞

6F: NIGHT SCHOOL LOOP∞ is a short first-person horror game set in a Japanese elementary school at night. The player starts on the sixth floor of an empty building and walks along a corridor lit by fluorescent lights, comparing each pass with what they remember of it. The game has a defined ending.

The core mechanic is a spot-the-difference loop. If the player sees no change in the corridor, they go downstairs. If they find an anomaly, they go upstairs. A wrong choice sends the player back to the sixth floor. The aim is to keep descending from 6F and find a way out of the school. According to the description, some of the changes may look different depending on which direction the player approaches them from, so anomalies are meant to be observed and judged from both directions.

The game is available for Windows and macOS and has Japanese and English interface support. The developer permits streaming and social media posts, including monetised content, and asks that people do not impersonate the official account or the developer.