About This Game

There is no turning back.

What does it feel like to descend into madness? Why does everything feel so uncertain... yet, strangely familiar?

You entered the darkness in search of someone who vanished into the light. An anomaly took them, and now, the echoes of their absence are dragging you into the abyss. You took a night shift in an abandoned underground drainage diversion, hoping to find answers. But what seemed like a routine job soon turns into a mental labyrinth. You are not alone. Every corner hides something that shouldn't exist—and the deeper you go, the harder it becomes to distinguish reality from the forces trying to possess and shatter your mind.

THEY see you.

Each shift changes the rules. Inspired by the golden age of survival horror and tactical management, Decline takes a familiar foundation and transforms it into something unpredictable. Just when you think you’ve learned how to survive... you’ll realize you’re no longer playing the same game from one night to the next. Every tool might save you—until it suddenly doesn't. Manage your resources, listen carefully, react under pressure, and adapt as the fear evolves alongside you.

LOOK BEYOND THE SURFACE.

It doesn't end at daybreak. Between each night, your mind will drag you into fragmented memories and 3D liminal spaces where reality fractures. Uncover hidden secrets, Easter eggs, theories, and multiple endings. A story that rewards those who dare to look where no one else will... You might piece it all together—or lose yourself in the process.

A CHALLENGE WITH NO ROOM FOR ERROR.

The abyss punishes weakness. Fail even once, and your fate is sealed in limbo. Only those who manage to survive every single night without dying a single time will unlock the full truth and the canonical ending.

The nightmare you know is not the one that brings the story to its end. What if everything you know were taken away?

So keep your flashlight on and stay awake until dawn.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Generative AI was used to create a small number of pre-rendered images used in optional easter eggs and hidden content. The core gameplay, programming, design, and the majority of the game’s assets were created manually by the developer. The game does not use real-time AI-generated content or AI-driven gameplay systems.

Mature Content Description

The developers describe the content like this:

This game contains moderate violence, disturbing imagery, intense jumpscares, mild blood, and unsettling creatures. It includes psychological horror elements, dark environments, and strange characters. It may not be suitable for players sensitive to horror or disturbing visuals.