Crystal Caves HD

Emberheart Games · Apogee Entertainment

Released: Oct 15, 2020
Platforms
Last updated: 16 Sep 2026, 00:13 GMT

Updates & announcements

20 posts

03 Sep 2026Developer post
BioMenace Remastered Joins the Apogee Legacy Bundle!
Four Apogee Classics. One Legacy Bundle. Snake Logan has some company. BioMenace Remastered is now part of the Apogee Legacy Bundle on Steam , bringing together four remastered action-platforming classics from Apogee's history into one collection. Whether you grew up hunting for
06 Jan 2026Developer post
⚠️ Security Notice – Compromised Discord Account
Hello 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 Disco
Hello 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 files, often claiming they are projects or work associated with me. These messages are malicious and do NOT come from me.
Please note:

❌ Do not click any links
❌ Do not download any files
❌ Do not trust messages claiming to be from me on Discord
I am working with Discord support to resolve this situation. Until further notice, please consider any Discord message from my account or server to be unsafe. I greatly appreciate everyone who is helping out by warning others about this breach and for keeping everyone safe.
Thank you for your understanding, and I’m very sorry for the problems and concern this may cause.
~ Primoz
Original post
02 Dec 2025Developer post
Mylo's Christmas Advent Calendar 2025
Mylo 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
25 Oct 2025Developer post
Hotfix v1.1.6.02
This 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 Cal
24 Oct 2025Developer post
Hotfix v1.1.6.01
Yesterday'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
Yesterday'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
Original post
23 Oct 2025Developer post
34th 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
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 Skin
Do you still remember the classic Mylo from the 1991? He's back in his "zombie" colors! During the festive October event, you can play as 'Zombie Mylo'. You can toggle the skin with festive setting but we are also adding a skin selection setting to the game soon so you can toggle between skins without changing the festive setting.
New Level Editor Toys and Tiles
New Objects
Shootable Switch Can be triggered only by hitting it with your rockets - hope your aim is good!
Reverse invisible blocks Blocks that can be revealed only from the reverse gravity form.
New Tiles
New "Pumpkin themed" Terrain tileset
Over 15 tiles
New Weather Types
Ash
Space Debris
Rain (Blue/Green/Red)
User Level Browser
New category - Oldest Don't bother scrolling to the bottom anymore, jump straight to the oldest maps!
Completed levels will now show the "Treasure Chest" icon so you can easily see which ones you've cleared.
We cleared a few bugs in the browser, which made the overall navigation more efficient and faster - no more endless "Loading maps" statuses.
If the map is downloaded but you're not subscribed to it, you won't have to press the "play" button twice anymore.
Fixes
Snowing even when the festive setting is OFF
Birds' "egg" drops won't disappear when the player is in the air
Security Update
A security vulnerability has been identified that affects games and applications built using Unity. While there is currently no evidence of impact on users, we’re taking all relevant steps to ensure you’re on the latest and safest version of the game. To keep you safe, we’ve released a new patch immediately after the news that addresses this issue.

You can read more about this in Unity's official statement:

https://unity.com/security/sept-2025-01

-------------------------------------------------

Maybe this will give you an excuse to enter the Crystal Caves mines again for a session or two. Or maybe, you can go ahead and create a level of your own - we are already waiting to play it!

Thank you for keeping Mylo alive by playing Crystal Caves! We're not done yet ːcc_myloː
Original post
20 Jan 2023Developer post
Patch v1.1.5.3
Fixes: 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 Dou
Fixes:

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 reports and for playing Crystal Caves! ːcc_myloː
Original post
20 Dec 2022Developer post
Minor Patch 1.1.5.2
Fixes / Updates ːCotcShovelː Small Red Pipe tiles collision issues fixed ːcc_strawberryː Few new tiles
Fixes / Updates

ːCotcShovelː Small Red Pipe tiles collision issues fixed
ːcc_strawberryː Few new tiles
Original post
29 Nov 2022Developer post
Update v1.1.5 - Winter Festivities
With an upcoming Christmas Advent Calendar event , I'm sure some of you are dying to start working on your new maps while others are waiting to play them. For this occasion, we added new toys, but most importantly, we added our first new enemy to the game - Crystalpede ! ːGiftedː
With an upcoming Christmas Advent Calendar event, I'm sure some of you are dying to start working on your new maps while others are waiting to play them. For this occasion, we added new toys, but most importantly, we added our first new enemy to the game - Crystalpede! ːGiftedː
New Level Editor toys

New Enemy - Crystalpede This is a new type of big enemy that acts similar to the caterpillar enemy except that it travels in all directions and it fires toward you if you cross its path.
New Trap - Boulder Boulder Spawner spawns a boulder that travels in one direction until it hits the wall.
New Bonus Pickup - Miner's Dew
Over 40 new construction blocks - Extensions to existing ones - Red pipes - Animated floors - More, check them out!
Level Editor updates

Level Theme setting You can now set what (holiday) theme is your custom level using by default. That means that even if the holiday is not active, the level will still use holiday-themed content. NOTE: Disable festive content setting will disable the themed content is toggled.
Random Terrain Generator updated - Noise threshold lowered to avoid very noisy generations - Generator can now produce island-type terrain (instead of holes in the big mass)
Light Switch toggle option You can now toggle the light switch ON by default so the level will start with the lights on. | NOTE: Last placed switch decides the default state
Other

In the Christmas season, falling boulders will be covered in snow.
I'm sure level creators, as well as players, will find these additions refreshing!
The Christmas Advent Calendar event is perfect for new mappers as well as for those who haven't done a level in a while. Reserve your date today and start shaping your Christmas Crystal Cave! ːcc_myloː
We can't wait to play your Christmas Themed levels. ːCotcHeartː
Happy Holidays everyone! ːsnowflakesː ːcc_myloː
Original post
26 Nov 2022Developer post
Mylo's Christmas Advent Calendar 2022
The year is around, and the Christmas holidays are nearly upon us! Like two years ago , we are again hosting a Mylo's Christmas Calendar event , because it's just too much fun not to do it again this year! Are you ready to get all festive? ːsnowflakesː Christmas is a time of givi
The year is around, and the Christmas holidays are nearly upon us!
Like two years ago, we are again hosting a Mylo's Christmas Calendar event, because it's just too much fun not to do it again this year! Are you ready to get all festive? ːsnowflakesː
Christmas is a time of giving, and what better way to do it in Crystal Caves than to create a Christmas level for everyone to enjoy? ːGiftedː ːCotcHeartː
Every day from December 1st to December 24th, one of you will publish the calendar level on Steam Workshop, which we can all play, and hopefully, we'll have a full calendar collection of 24 levels by Christmas! And who knows, you may even get some new toys again before the start of the event.
ːcc_candleː RULES:

Pick a date between Dec. 1st - 24th and publish your level on that day
Level must be finishable!
Name the level in the following format: "Advent Cal 2022 - 01"
ːCotcTorchː OPTIONAL RULES / GUIDELINES:

Let others know which date you've picked to avoid multiple submissions on the same day.
Try to conjure the Christmas spirit (description, visuals, shape...).
Everyone is welcome to join, even if you haven't made a custom level before.
ːcc_crystalː BONUS:

At the end of the competition, we'll pick one random participant who will receive a free copy of the game for gifting!
Subscribe to the Mylo's Christmas Advent Calendar 2022 level collection to get levels as soon as they become available.
This should be a fun event, so make sure that you, most of all, have fun!
Even if you can't participate as a creator, you are welcome to play all the entries. ːcc_myloː
To have even more fun in the event, join Apogee or Emberheart Games Discord family to share a laugh and creations!
Original post
03 Oct 2022Developer post
Update 1.1.4 - Get spooked and enjoy new random custom level filter
For the last two years, Halloween festive content was unlocked late in October and lasted around one week or two weeks. We decided to unlock it earlier this month, and from now on, it will be unlocked on October 1st. New ːcc_candleː Halloween Theme is now unlocked with October 1s
For the last two years, Halloween festive content was unlocked late in October and lasted around one week or two weeks. We decided to unlock it earlier this month, and from now on, it will be unlocked on October 1st.
New ːcc_candleː

Halloween Theme is now unlocked with October 1st Don't forget that you can always disable festive content in the game settings.
Random Custom Level browser With such a huge amount of custom levels, older levels hardly get any attention because it takes a while to scroll so far. That's why we added the Random Pick filter in the Workshop level browser. Every game session, 14 random levels will be picked for you to play.
New Dark Terrain and Torches added to level editor Do you feel like creating a new, dark, spooky level? I hope these will help you to achieve that mood.
Fixes ːCotcShovelː

After returning to the main menu from the custom level, the level browser will correctly display levels now
If you are new to level creation or not, feel free to create a Halloween-themed custom level, and we'll add it to the Spookfest level collection. As a player, you are welcome to subscribe to the collection and enjoy some spooky levels this October ːCotcSkullː
Happy Spooktober! ːcc_myloː
Original post
19 Aug 2022Developer post
Update v1.1.3 - Hotfix & Random Terrain Generation for level creators
Hey Crystal Cavers! Thanks to a fantastic community of level creators, we now have over 700 custom levels made ? That's almost one new level every third day since the last year, which is simply impressive. Hardcore, casual, puzzle, funny, weird, tribute levels, I'm sure you will
Hey Crystal Cavers!
Thanks to a fantastic community of level creators, we now have over 700 custom levels made? That's almost one new level every third day since the last year, which is simply impressive. Hardcore, casual, puzzle, funny, weird, tribute levels, I'm sure you will find something that you will enjoy, or simply play them all, and you're good for a while! ːcc_myloː
This hot-fix/update is fixing a very old bug that has been pesting new level creators since day one, and it is adding even more tools for level creators.
Fixes ːcc_explosionː

If you created a level after playing a studio level, you could lose your custom level by testing it and finishing it. This would replace your creation with an empty map.
New in Level Editor ːcc_strawberryː

Random Terrain generation Are you having problems coming up with a level layout idea? Sweat no more! Use the new Random Terrain generation feature to generate random terrain using a random theme.
Grid Long requested feature is finally here. The grid will show you the center lines of the levels so you can plan and split levels easily without counting tiles.
Zoom levels Want to see the whole map while designing it? Press TAB and change zoom levels.
Copy tiles You can now speed up your level design process by copying tiles by right-clicking on them.
It's time to get digging! ːcc_myloː
Original post
20 Dec 2021Developer post
Update v1.1.2 - Twibbles are here!
Year is around and we hope your adventures in the Altarian star system are going well ːcc_myloː This community have shown more love for custom content that we could ever expect (almost 600 custom levels!!!) and for that, we are releasing few extra toys to play with in level edito
Year is around and we hope your adventures in the Altarian star system are going well ːcc_myloː
This community have shown more love for custom content that we could ever expect (almost 600 custom levels!!!) and for that, we are releasing few extra toys to play with in level editor and one special item - Twibble Spawner! Get those spawners going and populate your levels with happy Twibbles ːGiftedː
Next to that, we also added a new type of crystals which are now used in Episode 4.
New level editor toys ːCotcKeyː

Twibble Spawner - spawns Twibbles that will hop around your levels.
Togglable Block - solid blocks that can be toggled on/off by switches
Yellow doors & levers
New background
15 new tiles (water glass pipes, crystal props, yellow hanging steel grids...)
New type of crystal to place
We can't wait to see what you come up with using all these cool stuff!
Happy holidays and Happy New Year! ːsnowflakesː
Original post
19 Feb 2021Developer post
Minor Update v1.1.1.3
ːcc_strawberryː NEW (Level Editor) Clouds can be placed as an object which you can place over background tiles. ːcc_crystalː UPDATES When hitting the Stop sign, the following objects will also stop moving now: - Enemy projectiles - Vacuum Tube - Air Blower ːcc_explosionː FIXES St
ːcc_strawberryː NEW

(Level Editor) Clouds can be placed as an object which you can place over background tiles.
ːcc_crystalː UPDATES

When hitting the Stop sign, the following objects will also stop moving now: - Enemy projectiles - Vacuum Tube - Air Blower
ːcc_explosionː FIXES

Stray white pixel in Gray Terrain removed
Original post
15 Feb 2021Developer post
Minor Update v1.1.1.2
:cc_explosion: FIXES Falling through the platform when walking over the Dark Platform Dark Platforms visible when the light switch is not placed Stray pixel on gray terrain :cc_crystal: UPDATES When Mylo's head explodes after blowing up the Air Tank, blood splatter will be spawne
:cc_explosion: FIXES

Falling through the platform when walking over the Dark Platform
Dark Platforms visible when the light switch is not placed
Stray pixel on gray terrain
:cc_crystal: UPDATES

When Mylo's head explodes after blowing up the Air Tank, blood splatter will be spawned in its place like in the original.
Original post
14 Feb 2021Developer post
Update 1.1.1 - Up to the Sky
Level creators rejoice, take Mylo up to the clouds with new toys at your disposal. Clouds, desert terrain, air blowers, and more! ːcc_myloː At the same time, I would like to announce that the game passed a big milestone - there are now over 400 custom levels made thanks to passio
Level creators rejoice, take Mylo up to the clouds with new toys at your disposal. Clouds, desert terrain, air blowers, and more! ːcc_myloː
At the same time, I would like to announce that the game passed a big milestone - there are now over 400 custom levels made thanks to passionate level creators. That's 100 amazing maps done every month since the release of the game and 7x the amount of levels in all 4 episodes together. ːCotcHeartː
If you haven't played custom levels yet I encourage you to do so and maybe try yourself at level creation while you're at it, we are always happy to play new levels!
ːcc_strawberryː NEW

New level editor toys to play with:
New object - Air Blower - pushes Mylo away from it (can be turned on/off with switches)
New object - Dark Platforms (platforms visible only in darkness )
New terrain - Desert (Yellow)
New tiles - Clouds (can be walked on), wooden box vertical middle pieces, single alien vine tiles, and diagonal decorative metal pieces!
ːcc_crystalː UPDATES

New sound added for breaking the egg with the Power shot (like in the original game)
ːcc_explosionː FIXES

Fixed Fruit Diet achievement typo
In low gravity levels, the player was pushed in the wrong direction if you fired before making a move
Key HUD icon displayed over other HUD elements on specific resolutions
If you hit the hidden crystal block and exited the level before points were added, the points were lost
Water pipe water leaking through toggling platforms
In the Workshop level browser, the download arrow stayed if you switched the page/filter before downloading ended.
Issue where 2-eyed mini-boss always moved to the right, regardless of the level editor settings.
Considering the huge amount of levels created, the next update will focus on the in-game Workshop levels browser. New levels push older ones down which hardly get any attention over time. We want to give equal attention to all levels so we will be updating the level browser to spice everything up.
If you want to hang around other Crystal Caves players, brag, need help with a level editor, or want to share your creations, join our Discord channel. There is always someone around ːcc_candleː
Original post
24 Dec 2020Developer post
Mylo's Christmas Advent Calendar is complete
Today we are opening the last doors of Mylo's Christmas Advent Calendar! ːGiftedː What a ride! 24 days and 24 levels filled with challenges, creativity and fun and it's all thanks to the members of the community who spent their time to design levels for us. Subscribe to the colle
03 Dec 2020Developer post
Minor Patch v1.1.0.1
This minor patch is fixing some of the bugs that were terrorizing Mylo and should improve performance on some levels. Thank you for bringing up the issues! ːcc_explosionː BUG FIXES White pixel appearing on blue doors after opening them Wrong color tint of the left log cap tile Un
This minor patch is fixing some of the bugs that were terrorizing Mylo and should improve performance on some levels. Thank you for bringing up the issues!
ːcc_explosionː BUG FIXES

White pixel appearing on blue doors after opening them
Wrong color tint of the left log cap tile
Under some circumstances, rocket won't break the egg and will fly through it.
Issue when destroying double-eyed miniboss with powerups (power rocket / red mushroom). That could result in more bugs, like where the stop sign doesn't disappear after being triggered.
ːcc_crystalː UPDATES

Improved performance on some levels.
As always, if you find an issue, please report it in Bug Reports section or directly to me on Discord.
Have fun and don't forget on Mylo's Advent Calendar, there are still some spots left to sign up ːGiftedː
Original post
30 Nov 2020Developer post
Update 1.1.0 - Christmas edition
Winter took over the Altairian system and some objects started to turn into Christmas presents & candies! What a time to be around mining for riches! Have you signed up for Mylo's 24 Days of Christmas yet ? ːGiftedː NEW Christmas holidays themed pickups lasting through the wh
Winter took over the Altairian system and some objects started to turn into Christmas presents & candies! What a time to be around mining for riches!
Have you signed up for Mylo's 24 Days of Christmas yet?
ːGiftedː NEW

Christmas holidays themed pickups lasting through the whole December (festive content can be disabled in settings)
Weather system - Snow
New level editor toys to play with: • New object - Gas Burner (can be turned on/off with switches) • New object - Timed draw platforms (platforms that are going on and off) • New object - Ice Block (watch out, it's slippery) • New object - Space Light (similar to the one you can find in overworld) • New background - Crystal Caves • New terrain - Snow land • New tiles - Animated lights, middle window pieces, vertical hill tiles, air pipe crossroad, hanging grass, a metal grid, and more!
ːcc_crystalː UPDATES

Workshop Level Browser is now showing unique downloads & votes amount for each level
When playing Workshop levels, filter & page position will be remembered when returning to the menu.
Hammer objects will update top and bottom position if collision changes in the runtime (eg. invisible blocks show, doors open...)
ːcc_explosionː FIXES

The level editor doesn't recognize changes (switching music, targeting objects, changing objects)
Steam level browser showing invalid page count
Rockman always going in the same direction, regardless of the starting direction
Custom level browser doesn't scroll properly through a bigger amount of levels
Weird behavior when selecting sound/music (mute) removed
Top levels filter in Workshop level browser wasn't working properly
Hammer objects won't hit invisible blocks if they are not visible yet
Have a holly jolly December and keep digging! ːcc_myloː
Original post
26 Nov 2020Developer post
Mylo's Christmas Advent Calendar 2020
Christmas holidays are just around the corner and to make the waiting easier, I invite you all to participate in Mylo's Christmas Advent Calendar event . ːsnowflakesː Each day from December 1st to December 24th one of you will publish the calendar level on Steam Workshop that we
Christmas holidays are just around the corner and to make the waiting easier, I invite you all to participate in Mylo's Christmas Advent Calendar event. ːsnowflakesː
Each day from December 1st to December 24th one of you will publish the calendar level on Steam Workshop that we can all play and hopefully, we'll have a full calendar collection of 24 levels by Christmas! And who knows, you may even get some new toys to play with before the start of the event.
Christmas is a time of giving and what a better way to do it than to give back to the communityːCotcHeartː
ːcc_candleː RULES:

Pick a date between Dec. 1st - 24th and publish your level on that day
Level must be finishable!
Name the level in the following format: "Advent Calendar - 01"
ːCotcTorchː OPTIONAL RULES / GUIDELINES:

Let others know which date you've picked to avoid multiple submissions on the same day.
Try to conjure the Christmas spirit (description, visuals, shape...).
Everyone is welcome to join, even if you haven't made a level before.
ːcc_crystalː BONUS:

At the end of the competition, we'll pick one random participant who will receive a free copy of the game for gifting!
Subscribe to the Mylo's Christmas Advent Calendar level collection to get levels as soon as they become available.
This should be a fun event so make sure, that you most of all have fun!
Even if you can't participate as a creator you are welcome to play all the entries. ːcc_myloː
To have even more fun in the event, join our Discord family to share a laugh and creations!
Original post