Screenshots
Watch trailer on Steam ↗KELDER
THOs Dev, Mad Muffin Studios · Published by THOs Dev
Content notice: Dried Bodies: There are scenes featuring old, desiccated bodies which may be disturbing to some players. Monsters: Some creatures in the game are depicted with severe physical deformities, such as missing legs or dislocated jaws. Blood Splatters: The game includes instances of blood splatter which may be unsettling.
Mixed — 68% positive (25 reviews) · 18 achievements
Last updated 28 Sept 2026
Trapped in a sinister post-Soviet basement, uncover the truth behind dark experiments and eerie anomalies. Solve puzzles, find keys, and survive against terrifying entities as you explore this atmospheric survival horror. Can you escape the depths of the KELDER?
£8.50
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Price history
Adventure, Indie · 2025 · More £5 - £15 games
Explore the chilling post-Soviet basement of KELDER, where puzzles intertwine with survival. Use keys to unlock truths and face terrifying entities as you navigate through atmospheric horrors.
About this game
Trapped in the ominous depths of a post-Soviet basement, you must navigate a chilling survival horror experience where every step unravels more about the dark history that lies within. "KELDER" plunges you into a labyrinth of fear and mystery, where many scavengers once lost in secret, leaving behind clues and horrors that defy explanation.
Unique Gameplay Every Time:
Every game offers a new experience with randomized events and encounters. No two playthroughs are the same, ensuring that each journey into the basement is uniquely terrifying.
Key Features:
Unravel Mysteries: Was this basement a site of sinister experiments or a nexus of unexplained anomalies? Discover the truth as you explore the eerie remnants of Soviet-era research.
Survival Horror Atmosphere:
Encounter strange and terrifying entities as you make your way through the basement. The chilling environment and haunting soundscape will keep you on edge.
Environmental Storytelling:
Unearth the stories of past adventurers through letters and environmental clues. Each discovery brings you closer to understanding the fate of those who vanished before you.
Puzzle Solving:
Find keys, solve puzzles, and unlock doors to progress. Each step forward may reveal more about the basement's dark secrets or lead you deeper into danger.
Immersive Walking Simulator:
Experience a tense and atmospheric journey where thorough exploration is key. The detailed environment invites you to uncover every hidden corner.
Unique Gameplay Every Time:
Every game offers a new experience with randomized events and encounters. No two playthroughs are the same, ensuring that each journey into the basement is uniquely terrifying.
Gameplay:
Awaken in a mysterious basement, with nothing but your wits to guide you. As you explore, gather keys and solve puzzles to unlock doors and reveal the basement's secrets. Letters and environmental details provide crucial hints about the dark experiments and anomalies that took place here. Beware of the strange entities that roam the halls—they are always watching, waiting for a chance to strike.
Objective:
Your goal is to escape the basement by piecing together its history and surviving its dangers. Navigate through eerie corridors, solve complex puzzles, and outwit or evade the terrifying entities that lurk in the shadows. Will you uncover the truth and find your way out, or become another lost soul in the depths of KELDER?
Can you survive the horrors and escape the depths? "KELDER" awaits those brave enough to uncover its secrets.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel Core i5-6400 (2.7 GHz 4 Core) / AMD Ryzen 5 1500X (3.5 GHz 4 Core) or equivalent
- Memory: 8 GB RAM
- Graphics: NVIDIA GeForce GTX 1060 (req. 6GB VRAM) / AMD Radeon RX 580 (req. 6GB VRAM) / Intel ARC A380
- Storage: 8 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel i7-8700 (3.7 GHz 6 Core) / AMD Ryzen 7 2700X (3.7 GHz 8 Core) or equivalent
- Memory: 16 GB RAM
- Graphics: NVIDIA RTX 2070 Super (req. 6GB VRAM) / AMD Radeon RX 6700 XT (req. 6GB VRAM) / Intel ARC A770
- Storage: 8 GB available space
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
KELDER – Major Update 1.1
Hello everyone,I’ve been observing and taking notes from your gameplay and feedback, and working really hard to deliver this major update in a short time. This patch brings a lot of new content, system improvements, and bug fixes that should make the experience smoother, scarier, and more immersive. Top HighlightsNew Journal System – keeps track of thoughts, tasks, and hints, with a UI notification for new notes.Full Tutorial Section – learn the core mechanics through an integrated tutorial.3 New Entities – each with unique stories and behaviours.80+ New Events – complete overhaul of encounters and event system.Lighting Overhaul – updated global illumination and post-processing for more comfortable visuals.Expanded Levels – new paths, rooms, and more save points across multiple levels.Keyboard Key binding – players can now rebind their keys.Full Patch NotesNew ContentAdded a Journal system for player thoughts, tasks, and hints.Journal UI updates when a new note is added.Added a full tutorial section with UI integration.Introduced 3 new entities with unique stories and behaviours.Added ~80 new events with a complete overhaul of the encounter system.Gameplay & SystemsSave system updated with more save points and locations.Save UI now notifies players when progress is saved.Save system improved to prevent rare softlock cases on critical paths.Players can now rebind keyboard keys from the controls menu.Critical events rebalanced and updated.LevelsLevel 0 slightly updated; location changes in location of Map 1.Level 1 updated with a new critical path at the end.Level 2 expanded with more save points.Level 3 extended with a large new room.OtherCharacter camera post-processing updated.Global illumination completely overhauled.Player vision adjusted for short-distance visibility in low light.PODV entity improved with new behaviour, effects, and encounters.Darkness entity updated with better interactions.Chairguy updated with improved door interactions.Radio modified with be...Read full article on Community Announcements (THOsdeveloper)Patch NotesOfficial
KELDER - Update 1.1 is in the works!
We’re excited to let you know that Update 1.1 is currently in development! This update will include:New entities - some that were originally cut during development are finally making their way into the game.Extended areas - environments have been expanded and adjusted to create a smoother, more fluid experience.Upgraded systems - fresh tweaks and mechanics to keep you on your toes.If you’ve already played the game, we’d love it if you could leave us a positive review - it really helps the game grow and reach more players.And if you have feedback, please share it! I’m actively reading your comments, listening, and working hard to improve the game for everyone.Thank you for being part of this journey - more details on Update 1.1 will be coming soon!Read full article on Community Announcements (THOsdeveloper)Patch NotesOfficial
KELDER - Update 1.0.5
Hey.We have been observing the players, and noted a few flaws and bugs.Navigation system - Your Maps now will show the current position or room you are inPDV19 - Behaviour overhaul, now he will be more responsive to the playerExtended FIZ , Beginners area - Little bit extended area, to be cycledTutorial Event - to bring some attention to the players about core controls Maps had small tweaksTeleportation bug fixed - bug occurred on teleportation from Liminal 1 THOs DevRead full article on Community Announcements (THOsdeveloper)Patch NotesOfficial
KELDER – Development Update & Roadmap
Hello everyone,This past weekend, KELDER went live and many gamers and streamers had the chance to experience it. I've been carefully watching playthroughs, reading feedback, and taking notes on what worked and what needs improvement.I want to share that KELDER will continue to receive regular updates until it fully becomes the ultimate horror experience I envision. Some content had to be cut due to time constraints, but I plan to reintroduce parts of it, expand on what's already there, and refine the overall experience to deliver a more intense and consistent sense of horror. I also aim to add additional language support so more players can experience KELDER.Here's a look at what's coming in future updates: Upcoming Changes & AdditionsEntity Improvements – Smarter, more dynamic behavior for certain entities.Expanded Areas – Some locations will be extended with new details and surprises.Micro-Events – Additional random encounters in pathways to keep players on edge.Critical Path Enhancements – More dynamics and clearer navigation hints.Localization – More languages will be added.Cut Content Returns – A few previously cut entities will be reintroduced (their documents and hints are already in-game).Monster AI Upgrades – Both main monsters will become more responsive, adaptive, and engaged with the player.Secret Events – Hidden environmental scares to reward exploration.Readable Notes – More in-world notes to expand lore and improve immersion.Customizable Controls – More rebindable options for comfortable play.Endgame Summary – Final results screen at the end of each run.Global Controller System – A refined feature that ensures every encounter is random, but now with more adaptive and sophisticated control tailored to each player's journey.This is just the beginning. I'll be working continuously to shape KELDER into the horror experience it's meant to be. Thank you all for playing, streaming, and sharing your thoughts. Your feedback is driving the next phase of develo...Read full article on Community Announcements (THOsdeveloper)AnnouncementsOfficial
KELDER is Here!
KELDER is finally here!After years of work, late nights, and endless cups of coffee, we're thrilled to share KELDER with you. This journey has been long and challenging, but every moment was dedicated to creating a truly immersive horror experience. Step into a tense and atmospheric world filled with dark secrets, strange entities, and unpredictable events. Every step you take could be calm… or it could turn into pure chaos. The game adapts to you, keeping you on edge with unscripted scares and dynamic encounters. Explore, solve puzzles, and uncover mysteries as you try to survive the horrors lurking in the depths.KELDER isn't just a game — it's an experience that reacts to you, making every moment unique, every walk unpredictable, and every discovery unforgettable. Are you ready to descend into the Kelder?Read full article on Community Announcements (THOsdeveloper)
