Atrium Mortis

Atrium Mortis is a psychological horror roguelite about observing your surroundings, outsmarting entities and solving high-stakes minigames. Across runs, you collect power-ups and earn diamonds for permanent upgrades. Jumpscares can be turned off in the settings.

Entities in the corridors

The Angels of Death patrol the corridors and wait for you to slip up, so you need to keep your eyes on them. The Face-Hiding Girl is a sorrowful spectre who dreads being seen; you must never look her in the eye. The Tall Man silently stalks in the dark, and if he visits, there is almost certainly nothing you can do. Other, not-yet-named entities lurk beyond.

Puzzles and trials

Puzzles include hidden-object time trials, finding a key with a metal detector, catching Faye the Fairy and outwitting The Riddlemaster. Minigames also include Red Light, Green Light and zero-g space parkour.

Observe and adapt

You spot anomalies in your surroundings, such as coins turning into ducks, a knight turning to face you or a torch burning green. Items let you stack power-ups: dice can reroll the current anomaly, while a clock slows down time.

Diamonds earned on each run unlock permanent upgrades, including Hindsight, which lets you review missed anomalies; Foresight, which reveals anomaly odds; and a Radiant Sword that can strike down Angels of Death. Hall 10 contains the Atrium’s ultimate guardian. Each attempt can uncover deeper secrets as you build strategies and test your reflexes.