- Action
Game
Crystal Caves HD
Return to the underground classic world of treasures and traps in the HD remake of Crystal Caves! Guide Mylo through puzzles and arcade challenges of your favorite episodes, then explore the whole new Episode loaded with all new puzzles, enemies, challenges, hazards and help Mylo get back home!
Return to the underground classic world of treasures and traps in the HD remake of Crystal Caves! Guide Mylo through puzzles and arcade challenges of your favorite episodes, then explore the whole new Episode loaded with all new puzzles, enemies, challenges, hazards and help Mylo get back home!
About Crystal Caves HD
- Released
- October 2020
- Developer
- Emberheart Games
- Publisher
- Apogee Software
- Engine
- Unity
- Platforms
- PC (Microsoft Windows)
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
From the developers
Official announcements, newest first. Posted on Steam.
- Community Announcements⚠️ Security Notice – Compromised Discord AccountHello everyone, I want to inform you that my Discord account (admin of Emberheart Games server) has been compromised and taken over by an unauthorized third party. This individual currently has access to my account, including my friends list and the whole Emberheart Games Discord server. The attacker is impersonating me and sending private messages and server announcements that contain links or...
- Community AnnouncementsMylo's Christmas Advent Calendar 2025Mylo skipped two Christmas Calendars in a row, two! This is unheard of and like many of you requested, we're organizing one this year as well. We're a bit late with the announcement since this is the second day of the event but the good news is that you can already play the first two maps from the Calendar! ːcc_myloː {STEAM_CLAN_IMAGE}/38723336/31d17cbb915b4276405205edfb10d7410fda2aaf.png What...
- Community AnnouncementsHotfix v1.1.6.02This patch fixes the issue where you can get stuck in the level by landing on the hittable blocks while under the inverse gravity effect. This would prevent Mylo from jumping.Thank you for your reports!PS: Due to significant interest, it seems we'll be holding Mylo's Advent Calendar 2025! Signups are already live ːsnowflakesː
- Community AnnouncementsHotfix v1.1.6.01Yesterday's update is now live for Steam Deck users as well (Linux build!). Fixes Mylo can get stuck in Shootable Switch Reverse-hidden blocks not working when gravity is enabled by default Text going off-screen Updates Some texts and labels adjusted Exiting the level editor will play a sound now
- Community Announcements34th Anniversary update - New Mylo skin and level editor toys!ːcc_crystalː Happy 34th Crystal Caves anniversary! ːcc_crystalː You thought Mylo was gone for good? Think twice! ːcc_myloː We were very busy during this time, but we're back with some new level editor toys, QoL updates for the User Level Browser, and a new 'zombie' Mylo Skin! New Mylo SkinDo you still remember the classic Mylo from the 1991? He's back in his "zombie" colors! During the festive...
- Community AnnouncementsPatch v1.1.5.3Fixes: Snow won't appear in the game anymore outside the winter holidays (it may appear in custom levels, due to the author's settings though) Stop sign will now stop the following entities: - Moving Turret - Boulder Spawners & Boulders - Crystalpede animation - Tornado Double-eyed monster will now play the 'Fire' sound Double-eyed monster will fire slightly more often now Thank you for your re...
- Mods indexed
- 1.2k
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
Most downloaded
Measured from the source's own counts, summed across every release.
- Secret Agent Level 01In an alternate reality, top agent Mylo 006 1/4 is on a mission to collect crystals. He needs to collect all the crystals on the Red Rock Planet in order to prevent the diabolical plans of the D.V.S. When I tried to recreate this SA level in CC, I found1.8k downloads
- Selective NostalgiaNostalgia, it can be a fickle beast. And often highly selective, especially when it comes to shareware platformers. Enjoy! An LGR custom map thing™ youtube.com/lazygamereviews youtube.com/lgrblerbs1.3k downloads
- Guard PostA challenging level that's not hard for a change? A level that doesn't reQuire crazy skills? I know right? It's crazy!873 downloads
- WolfMines E1M1What a familiar layout... Escape from the WolfMines! For your average player that will be a thrilling -if simple- task. However, the true explorers out there may find themselves lost in search of all of the treasures! Follow me at @dunkelschwamm for more fun Wolf3d-themed content!432 downloads
- Commander Keen Level 9Although it isn't all of level 9, the general spirit of the level is here.413 downloads
- Advent Calendar - 02Advent Calendar - 02: Mylo visits Killroy for the holidays, but he's no where to be found when Mylo arrives. Looking up, Mylo is horrified to see a giant spaceship overhead. "Is Killroy up there?", Mylo wonders and sets off to find out!397 downloads
- Tutorial 101Learn the basics of Crystal Caves! Help mylo get out of the storage room.331 downloads
- Advent Calendar - 01Mylo is trying to get home for Christmas but he got caught in snowstorm. His galactic miner's guide talks about shelter nearby. Get to the shelter and grab all frozen crystal you can find along the way. Made for Mylo's Christmas Advent Calendar.314 downloads
- Foxy-001My original dream level, designed by myself back in the 90's in the back pages of my maths book. Starts off cruisy, but ends with a bang!275 downloads
- Some Kind of MapJust a map I made in a game I loved as a kid. Maybe fun.273 downloads
- Advent Cal 2025 - 01Difficulty: Easy Hidden Fruits: 3 Max Score: 195900 The toys in the Toy Factory have been overtaken by AI. Who would have thought this could happen? Happy Advent!268 downloads
- Advent Cal 2022 - 01Mylo set out to gather a Christmas Tree for the holidays. He found one at the castle ruins and just when the tree fell, he noticed the glimmering crystals amongst the ruins. Get them all and bring back the tree. Happy Holidays from Emberheart Games <3253 downloads
- DOS Base #9Nothing super complicated about this level. i wanted to make something that combined both tight corridors and wide open areas of space reminiscent of classic pc platformers.249 downloads
- Lost level - E4L12Trivia bits: This level was designed for episode 4 level 12 but it was abandoned because something just didn't feel right. Dev thoughts now: "it's not that bad actually."240 downloads
- Advent Calendar - 04It's Christmas Eve 1992 and Mylo is exiting the mines after a year of hard work. Help him get to his log cabin so he can take a break from having to be HD all the time and enjoy the holidays playing the biggest Keen ever!240 downloads
- Super Mario 1-1Level's name says it all :)240 downloads
- Mylo's Mining MadnessMylo finds himself in a mine that branches in all directions. Will he find all the crystals and get out? And what about the guarded treasure chests?238 downloads
- Advent Calendar - 20It's Christmas morning in 1992, and Mylo's got up early... p.s. please dont kill the sock puppet monster! It's actually mylo's dog who got to mylo's sock present first!229 downloads
- Advent Cal 2025 - 02Mylo received a cryptic package, containing a letter and a funny red suit. The letter reads: "Mr. Steamwitz, the storm blew our baubles to a place where nobody has gone before. Would you help me out?" ~Santa Get into the suit and help the old man out!220 downloads
- ADG Map 01Just a quick level made to demonstrate the level editing capabilities of Crystal Caves HD in an upcoming Ancient DOS Games filler video! ;)219 downloads
- Advent Calendar - 24Mylo was speeding home when one of the Altarian villages got attacked by the aliens. * * * You can't bring back the village but you can save all the gifts and Christmas ornaments you can! * * This is Mylo's final deed before the holidays. * * Merry and joyful Christmas!!!214 downloads
- Advent Cal 2022 - 02Difficulty: Easy Hidden Fruits: 3 Max Score: 163100 Welcome to the Christmas Market! Spent money at the food stores, enjoy your time at the skating rink, search for presents at our christmas tree or visit the local concert. Happy Christmas!213 downloads
- Jill of the JungleMylo finds himself lost in a dense alien jungle. From the corner of his eye he glimpses someone watching from the shadows, but when he turns his head they seem to recede into the darkness. The sound of drums begins in the distance. Time to get out of here.210 downloads
- Amigara faultFirst level! Can't believe how good this remake is. Thanks to Emberheart Games and Apogee for making it happen!209 downloads
Browse all 1.2k Crystal Caves HD mods Sortable by downloads, rating and date.
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Why Crystal Caves HD mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host Crystal Caves HD mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.