15th Prison is a premium action game developed by Zettanium. It is a horror escape game where you are trapped in a prison with a dark and violent history. You must navigate 15 blocks, find anomalies until you reach the 15th final block, where three mysterious doors await.

The prisoners of 15 blocks

15th Prison is a first-person psychological horror escape game set within a labyrinthine prison notorious for horrific events. You must navigate through 15 blocks inside the prison, all while observing the surroundings and collecting envelopes provided by guards, crucial elements for the escape plan.

This game emphasizes anomaly detection: if an anomaly is spotted, you are advised to turn back immediately; if none are found, you must proceed forward. Upon reaching the final 15th block, three doors await—each leading to unique puzzles and endings. While great for a quick experience, players looking for a long-form game might find it too brief.

A compact yet haunting experience

15th Prison delivers a tense, atmospheric horror experience packed into a short, focused escape game. Its unique anomaly detection mechanic and multiple endings offer replay value and psychological thrills. Though brief in length, it’s a memorable journey for fans of experimental horror and immersive, first-person storytelling.