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Caverns: Lost Sky

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Caverns: Lost Sky

Tetravoxel Limited · Published by Tetravoxel Limited · Official site ↗

5 user reviews — 60% positive (5 reviews)

Last updated 27 Sept 2026

Caverns: Lost Sky is a single player action-adventure RPG set in a fully destructible, voxelized subterranean realm. Join Strato in the Tellurian Sector as he battles hordes of Fera in his quest to find the sky. Level up and increase your stats, or ascend the caverns searching for buried treasure.

£15.49

Lowest price we've ever recorded

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Price history

3 Sept 2026Lowest: £15.49 · Highest: £15.4911 Oct 2026

Action, Adventure, Indie, RPG · 2019 · More £15 - £30 games

Embark on Strato’s quest through the Tellurian Sector, fighting Fera and uncovering treasure in a destructible underground world. Level up your stats or ascend the caverns for more power.

About this game



⠀⠀⠀⠀"For thousands of cycles, remnants of humanity have dwelt peacefully within the subterranean village of Telluria. A young spelunker's world is turned upside down when a routine mining expedition is ambushed by a crazed horde of Fera, leaving him the only survivor."

Join Strato in an action-packed adventure RPG through the voxel wilderness of the Tellurian Sector, and uncover the truth about his world! Explore winding labyrinths and colossal caverns powered by our in-house Numinous Engine. Engage large groups of enemies with a real-time combat system, where weapons have their own personality. Level up and find rare treasure to aid in your journey, or follow legendary recipes and fight with the tools of your ancestors.

GAME FEATURES

⠀

Dive into the Tellurian wilderness with Strato and check out a variety of different mechanics, all the while avoiding hazards and battling Fera. Current major features include:

Current Features

  • Explore - Trek through an endless cavernous system with unique geographical land marks
  • Combat - Battle hordes of enemies, each with their own personality and fighting tactics
  • Loot - Plunder buried treasure for more than 80 equippable items, including 7 armor sets
  • Tools - Select from a range of tools including mining picks, grapples, torches, and beacons
  • Harvest - Mine and collect several types of ores, or harvest plants for recipe ingredients
  • Craft - Discover over 100 unlockable crafting recipes with multiple rarity types and qualities

Upcoming Features


  • Dungeons - Conquer mystic dungeons with layouts that change upon each visit
  • Quests - Complete quests to progress the story-line, or spend time on side quests
  • Towns - One population center with NPCs and stores to interact with, per sector
  • Skill Upgrades - Spend skill points, powering up and unlocking particle-based skills
  • Cut-Scenes - In-Game cinematic sequences accompanying quest progression

ENGINE HALLMARKS

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Caverns: Lost Sky runs on our custom-built Numinous Engine. Early access allows us to refine not only the game, but the core engine too. Here are some of its advanced capabilities:

  • Tetravoxelization - Produces angled terrain shapes making it easy to walk and run over
  • Membronic Linkaging - Creates endless, organic-looking tunnels and cavernous systems
  • VoxelScript - Custom-built scripting language used to easily define enemy AI behaviors
  • In-Game Debugging - Press F keys to visualize hit boxes, toggle free camera, and more
  • Volumetric Particles - Define particle systems for resources, enemies, items, and skills
  • Destructible Terrain - Fast terrain modification in real time

System Requirements

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Minimum

Minimum:
  • OS *: Windows 8 (64 bit only), Windows 10 (64 bit only)
  • Processor: Intel i5 @ 3.0 GHz or higher (or AMD equivalent)
  • Memory: 8 GB RAM
  • Graphics: Geforce GTX 1060 / Radeon RX 570 or higher
  • DirectX: Version 11
  • Storage: 2 GB available space
  • Sound Card: DirectX® compatible on-board
  • Additional Notes: No internet connection needed.

Recommended

Recommended:
  • OS: Windows 10 (64 bit only)
  • Processor: Intel i7 @ 3.3 GHz or higher (or AMD equivalent)
  • Memory: 16 GB RAM
  • Graphics: Geforce GTX 1080 Ti / Radeon RX Vega 56 or higher
  • DirectX: Version 11
  • Storage: 8 GB available space
  • Sound Card: DirectX® compatible on-board
  • Additional Notes: No internet connection needed.

Supported Languages

English*
*languages with full audio support

Latest news

  • AnnouncementsOfficial

    The Future of Caverns: Lost Sky

    Hello Everyone, Today we have an important update regarding the future of Caverns: Lost Sky. After much consideration, we have made the difficult decision to transition Caverns out of Early Access without a formal release. This decision was not made lightly. Unfortunately, despite our best efforts, we did not see the level of interest needed to sustain ongoing development. As much as we love Caverns: Lost Sky and the vision we had for it, real-life obligations have forced us to prioritize other responsibilities. We want to express our deepest gratitude to all of you who supported us along this journey. Your feedback and enthusiasm for our game meant the world to us, and we are truly grateful for your support. While we understand that this news may be disappointing, we believe it is important to be transparent with our community. Cavern's Lost Sky will remain on Steam in its current state, but with limited visibility, and without the Early Access tag or Q&A. Although the exit from Early Access is permanent, it is possible that Caverns eventually gets a full release. However, we want to be realistic and acknowledge that this may not happen given the time that has passed and our current circumstances. We will continue to monitor the situation and remain open to any opportunities that may arise. Thank you for being part of the Caverns: Lost Sky community. Sincerely, - Team Tetravoxel
    Read full article on Community Announcements (Tetravoxel)
  • Patch NotesOfficial

    UPDATE: Patch 0.1.10

    https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/da6e81c163bace514aa5daa5aba178400996cc85.png Hi Caverns fans! Update 0.1.10 is focused on reducing the minimum system specifications for the game, optimizing the game on existing systems and fixing bugs which impact playability. Optimizations Frame stutter has been reduced by modifying the render pipeline to prevent GPU stalls. This issue was especially apparent when new chunks were loaded. Additionally, a large amount of redundant interpolation has been removed from our deferred lighting system, further improving frame rates. Finally, we made the VRAM requirements of Caverns more flexible, allowing large performance gains at lower resolutions. https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/759136db3113bc495fe046627981a5db0e1f99b2.png Fixes A large number of gameplay issues were fixed with this update. Some highlights are: Fixed ores only breaking when a mining tool was equipped Prevent catastrophic failure if Sticky Keys are enabled while in fullscreen mode Fixed mouse position, Mining, and Placing items when in non-1080p resolutions Fixed Treasure chests/Items cannot be clicked when in non-1080p resolutions Fixed bug where it was impossible to move window in windowed mode, even while paused. Fixed Craft Menu bug where recipe list would reset after every craft. No longer occurs. For the full list of changes, see 0.1.10 Patch Notes. Here at Tetravoxel Limited we would like to thank the community for all their suggestions, bug reports, and support. Together we hope to make Caverns: Lost Sky as fun, satisfying and rewarding as possible! - Team Tetravoxel ( :
    Read full article on Community Announcements (Tetravoxel)
  • Patch NotesOfficial

    UPDATE: Patch 0.1.9

    https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/3fe19cda4c0e06f27cc22229165c176e13dc43dc.png Hi Caverns fans! We are happy to introduce our second mob to the realm of Caverns: the Acari. These small creatures are known for ambushing unlucky Spelunkers. A short stature and fast movement speed allows Acari to prey on unsuspecting victims. Watch out for their drill-like snout which they use for a strong piercing attack! https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/242f341b83fd3e8bfcd50dc637acef3a56ea1a2d.png In this update, besides adding the Acari, we also overhauled our path-finding algorithm used by all enemies - including the ant-like Poneroids. Our new approach helps enemies navigate complex terrain surfaces to reach and attack Strato. As shown in the image above, enemies can now dynamically change their path to reach you as you're moving. In order to accomplish this, we have implemented a pathfinding algorithm based on D*-Lite, extended to work with agents that can navigate on walls in 3D. This new system works well enough, but it still has some issues to iron out. In other words, you can "confuse" a large group of enemies if you try! Don't get used to it - as we iron out the flaws, you may find it harder to confuse them. Implementing such an system may seem overkill, but we have a good reason for it. As each new enemy we introduce has it's own method of moving around, implementing a customized pathfinder for each would be incredibly time consuming. H* was designed to work with any method of movement, in any number of dimensions, with no changes. This means we only have one pathfinder to maintain, not several. The next update will bring additional capabilities to the Acari, such as jumping off ledges and, time permitting, underground sneak-attacks! https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/d575bf70e74c6bf60bb2ee80d93ca65178c84e6c.png Here is a greater list of additions fo...
    Read full article on Community Announcements (Tetravoxel)
  • Patch NotesOfficial

    UPDATE: Patch 0.1.8

    https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/4e901d5c478a989fc5f7587cf2b5d70391b36f9c.png Update 0.1.8 Enemy AI Re-haul Hello Everyone! Over the past few weeks we have been working day and night to re-haul our core AI code base, which is what allows enemies to be scripted in various complex ways. The new, polished framework has allowed us to identify and fix several behavioral issues with our enemy AI. Much of our work has been laying the foundation for an increasingly complex set of enemies. The first of these new enemies, the Acari, will be available within the next few updates! We also fixed two major bugs affecting item drops. https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/6c9974eab5a506cabcaf87b0514a454fcd1084ca.png Voxel Script 3 The first question you might as is "Why 3.0? What happened to 2.0?". Originally, Voxel Script was a Domain-Specific-Language (DSL), with it's own custom interpreter. Near the end of Voxel Script 2.0's development, it was discovered that the latest version of Microsoft's Roslyn toolkit was fast, reliable and customizable enough to replace a DSL. In fact, the speed and reliability was so great (after some tweaks), we decided to use the Roslyn-based implementation as Voxel Script 3, skipping 2 altogether! https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/6aa5f0211feeb630a4bdbbf99f24f8139b0c41a3.png Additionally, Voxel Script now has Video Studio Code integration, and supports loading external scripts and content packs. This sets the stage for modding to come to Caverns in the future! https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/2d31e35f4ada830b00c9ea8a0f0aae4daedc67ba.png Bug Fixes A couple of major fixes ship with this update: This update fixes an issue which caused Poneroids to drop unusable tools and weapons - all drops are now usable by the player. Grappling Hooks had no variability to their stats - their Range and Coo...
    Read full article on Community Announcements (Tetravoxel)
  • Patch NotesOfficial

    UPDATE: Patch 0.1.75

    https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/bce38a322c8902a41f224acb280c9869830b43dd.png Update 0.1.75: Visual Combat Indicators Hello Everyone! Update 0.1.75 brings two important features of any RPG: Critical Hits: Weapons now have a chance to do bonus damage based on the player's "Critical Chance" and "Critical Bouns" stats. Enemy Loot: Slain enemies now have a chance of dropping items, materials or potions. We have also made changes to the Stats Menu to improve the readability of player stat values. https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/84ae7843cceaeebf9c4c639b5240f0f6dcba11a1.png Critical Hits Whenever a weapon is used, it now has a chance to do additional bonus damage. The chance depends on the player's "Critical Chance" stat, which can be increased using the "Luck" attribute. The amount of bonus damage depends on both the weapon's original attack and the player's "Critical Bonus" stat. This stat can be increased by putting points into the Strength attribute. Enemy Loot Drops Previously, enemies only dropped experience, health, energy or fatigue orbs. Now, some enemies have a chance to drop loot in the form of equippable items, potions, or materials! Some items are more likely to be dropped by specific enemies, and the loot is randomized. https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/34184135/444cd4b832e99916c5529f52881d9a0343d21638.png Status Menu Changes The Stats Menu (seen above) has been improved to make the detailed text on the left panel more readable. Additionally, the names of various stats have been revised to better reflect their usage. There are similar changes in the Item Description section of the inventory menu. Bug Fixes Several bugs have been fixed in this update, including a user requested fix to improve the "durability warning" sound effect. The warning beep now only plays for a short time, and only after using the item. Additionally, Poneroids are now ...
    Read full article on Community Announcements (Tetravoxel)

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