Crystal Caves HD news & patch notes

Game Update

Mylo's Santa Outfit

Skin Selection

New Terrain tiles

Christmas Advent Calendar 2025 Levels Collection

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 Calendar 2025! Signups are already live ːsnowflakesː

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

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

• 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

• ːCotcShovelː Small Red Pipe tiles collision issues fixed
• ːcc_strawberryː Few new tiles

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.

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!

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

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. {STEAM_CLAN_IMAGE}/38723336/f968e1ff8c59771c57776f7dbf0e750e6093ff11.gif
• 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.

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

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

: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.

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.

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.

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

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!

FIXES

• Snake & Spring monsters ignored starting direction set in the level editor
• In level editor save dialog, input was filled with random letters on start

UPDATES

• Double-eyed miniboss fire ratio increased slightly

LEVEL EDITOR UPDATES

• New tiles -- Lava fall -- Steel hanging block -- Bottom part and platform for grass & rock hills -- Middle pieces for red and blue metal hanging blocks -- Apogee Software sign -- More
• Turrets can now be rotated in all directions, not just horizontally (moving turrets included)
• Fire pipes can now be turned upside down.

SILENT UPDATES & FIXES

• Missing fruit spawns on E1L15 (glass block maze)
• One fruit pickup was not reachable in E1L14 (grey background, grey blocks)
• Missing 2 bonus eggs on E4L10

FIXES

• Falling rocks have too small collision
• E3L10 banana fruit spawn position changed
• Secret Level - Gamepad rumbling effects added
• Secret Level - Gamepad rumbling won't stop if you restart the secret level
• Secret Level - Restore menu height incorrect
• 'q' letter could not be used in any text boxes
• Level Editor - Music ignores audio settings
• Level Editor - Some enemies will ignore direction set in the editor
• Restore game wording not consistent (Load Game replaced with Restore game)

UPDATES

• Halloween holidays themed pickups lasting from October 28th to November 2nd (festive content can be disabled in settings)
• You can skip pages with Page Up/Down
• Menu options reorganized
• Mylo sprite got updated with proper shading instead of mirroring the sprite
• New terrain tileset and background (space) added to the level editor, get creative ;)
• You can now scroll through map tiles with Page Up/Down

FIXES

• Mine Cart floating under specific conditions
• Low Gravity not present on E4L01
• On Workshop level rate panel, default level name is used for every level
• Story screen doesn't use volume settings
• Falling through some platform tiles when placed in specific position
• Centipede tail lagging behind under specific condition
• Rocket passing through Egg when it's placed next to the wall
• Air enemies & Spiders are ignoring hitting invisible collision

UPDATES

• Darkness in dark levels is slightly brighter with more contrast
• Enemy sprite shading updated to match the original game
• Workshop level browser improved - You can browse through more than 50 levels now - Filter added to display levels that need more ratings - consider playing them. - Reputation info added to each map which is constructed from amount of votes, up votes and down votes. Higher the reputation, more votes (most likely positive ones) it has. Low reputation can also mean there are not many votes yet.
• 3 New tiles added to the level editor - Left & right arrows - Stone platform (sprite was part of the original assets but never used in game)

SILENT UPDATES & FIXES

• Fixed statistic screen that was showing wrong amount of gems for Episode 4
• Some achievements goal amount & description don't match