Step into the chilling embrace of "KELDER," a psychological survival horror experience that traps you within the ominous depths of a post-Soviet basement. Developed by THOs Dev and Mad Muffin Studios, this indie title plunges players into a labyrinth of fear and mystery, where the lingering echoes of past scavengers and unexplained anomalies await.

The core of KELDER's terror lies in its unpredictable nature. Each playthrough promises a unique journey, thanks to randomized events and encounters that ensure no two expeditions into the basement are ever the same.

This dynamic approach keeps players on edge, constantly adapting to new horrors and unraveling fragments of a disturbing history.

Was this subterranean space a site for sinister experiments, or a nexus of paranormal phenomena? The narrative unfolds through exploration, urging you to piece together clues and confront the unsettling truths that lie buried beneath the surface.

With its realistic atmosphere and thrilling mystery, KELDER offers a deeply immersive and terrifying adventure for those brave enough to descend.

Overview

"KELDER" is a single-player survival horror game set in a post-Soviet basement, developed by THOs Dev and Mad Muffin Studios. It features a strong emphasis on psychological horror, mystery, and exploration, with randomized elements ensuring high replayability. The game is available on Steam and supports multiple languages, including English and Simplified Chinese with full audio.

Highlights

  • Dynamic Survival Horror: Experience a unique and terrifying journey every time with randomized events and encounters in a post-Soviet basement setting.
  • Deep Mystery and Exploration: Unravel the dark history of the basement, questioning whether it was a site of sinister experiments or unexplained anomalies.
  • Indie Psychological Thriller: Developed by THOs Dev and Mad Muffin Studios, this single-player adventure focuses on building suspense and psychological dread.

Who It's For

This game is for players who enjoy psychological horror, survival horror, and walking simulators with a strong narrative and mystery element. Those who appreciate atmospheric tension, jump scares, and a sense of dread will find "KELDER" particularly compelling. Its randomized nature also appeals to players seeking high replayability in their horror experiences.

Game Info

  • Developer: THOs Dev, Mad Muffin Studios
  • Publisher: THOs Dev
  • Release Date: August 15, 2025
  • Genre: Adventure, Indie, Horror
  • Player Mode: Single-player
  • Content: Features disturbing imagery such as desiccated bodies, deformed creatures, and blood splatters.