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Ratatan’s December Update: Descent of the Dark Ratatan

[previewyoutube][/previewyoutube]

Hello, everyone!
Thanks so much for waiting.
We’d like to share the current progress on the next major update planned for December.
This update has been particularly challenging to develop, and we are currently aiming to release it around the end of December.
Once adjustments are finalized, we’ll publish detailed patch notes—so please look forward to them.

Additionally, this update connects directly to “To the Everafter”, planned for next spring.
From here, the story and challenges that lead toward all the Dark Ratatans—and ultimately the mysterious “??? Battles”—will finally begin to unfold.
We hope you’re excited for what’s coming!

[h2]Descent of the Dark Ratatan[/h2]
In this update, we’ll be introducing new events and new battles related to the Dark Ratatan.
As mentioned previously, one of the major issues with the roguelite structure has been its over-reliance on battles, so we’re refining the experience to better balance battles and event-driven progression.

[h3]Event Section: Episode 2 Unlock[/h3]
After clearing World 5, new story content will unfold as Episode 2.
The events are designed so players can gradually experience the lead-up to challenges such as Goddess Games and Formidable Foes.

Furthermore, the Dark Ratatan events are not just additional boss encounters—they play a central role in storytelling and touch on the core of Ratatan’s narrative.
They also function as roguelite events, evolving the structure so that story and gameplay become more closely integrated.

Regarding the new stage tricks and gimmicks shown previously on the roadmap:
For the December update, we decided to integrate these elements into the Dark Ratatan event side, in order to focus the design and development resources on delivering a cohesive experience.

[h3]Battle Section: Dark Ratatan Fights[/h3]
The Dark Ratatan battles follow a structure unlike any previous boss fights in the game.
In addition to their own attacks, they command Dark Cobun through musical cues, mirroring Ratatan’s own command style.

The difficulty ranks among the highest in the entire game, and defeating them will reward players with powerful Mythic-tier gear.
Not all Dark Ratatans will appear in this update; they will be added gradually in future patches.

A major highlight of these battles is the new original track composed specifically for the Dark Ratatan, forming the core of the battle presentation.
We hope you enjoy this fresh musical experience.

[h2]New Ratakaruta Feature: Duo[/h2]
A new system, Duo, is coming to Ratakaruta.
By raising the elemental forces of two or more attributes beyond a certain threshold, you’ll gain access to powerful Duo Ratakaruta.

This expands deck-building possibilities in two directions:
• Continued support for single-element builds
• New incentives for multi-element, hybrid builds

Because Duo cards are extremely powerful, the December update will limit acquisition to one per run.
We will continue monitoring balance and may adjust this limit in the future.

[h2]New Function: Goddess Gacha[/h2]
The Goddess Gacha allows players to convert unwanted equipment, accessories, and materials into points, which can then be used for gacha pulls.
Some exclusive items will appear only here, but the feature is intended as a light-hearted way to recycle surplus items.

[h2]Multiplayer Adjustments[/h2]
We’re updating the online random match lobby to improve usability.
New features include:
• Ability to enter any available room
• A refresh button for lobby listings

[h2]New Legendary Accessories[/h2]
We are adding a new accessory rarity: Legendary.
These accessories include random Decorune effects, further enhancing strategic depth in build crafting.

https://store.steampowered.com/app/2949320/Ratatan/

Early Access v0.6.9 Hotfix Patch Notes

[h2]Update[/h2]
  • [p] Super Fever Skills now grant Super Armor.[/p]
    • [p] Super Fever Skills will no longer be canceled by knockback or status effects caused by enemy attacks.[/p]
  • [p] Improved gameplay experience by preventing the sudden drop in BGM intensity from reducing player enjoyment.[/p]
    • [p]Adjusted Super Fever Skill behavior so that not all Tension Gauge is consumed upon activation; a small portion will now remain.[/p]
    • [p]BGM now transitions smoothly with a fade after using a Super Fever Skill.[/p]
  • [p] Extended the display time of item rewards after opening a treasure chest during 'Treasure Chance'.[/p]
  • [p] In Random Match lobbies, players who remain inactive for 4 minutes will now automatically leave the lobby. [/p]
    • [p]This prevents multiplayer sessions from starting due to idle players.[/p]
  • [p]Added a message that appears when attempting to join a Random Match and no available rooms are found.[/p]
  • [p] In multiplayer lobbies, the player who becomes the room owner will now have an owner icon displayed next to their status.[/p]
[h2]Bug Fixes[/h2]
  • [p] Fixed an issue where save data could be lost if it failed to load properly at startup.[/p]
  • [p] Fixed a crash that could occur when freeze and burn effects were applied simultaneously.[/p]
  • [p] Fixed an issue where certain visual effects did not display as intended.[/p]
  • [p] Fixed a bug where obtaining Ratakaruta under specific conditions in multiplayer could cause an error.[/p]
  • [p] Fixed an issue where Raindrop Hop would hit enemies and fail to explode upon ground impact.[/p]
  • [p] Fixed COMtan’s movement speed when passing through the Goodie Gates in multiplayer.[/p]
  • [p]  Fixed an issue where interacting with a Treasure Chance chest after clearing a wave could become impossible until the player moved away from it once.[/p]
  • [p]  Fixed an issue where character voices sometimes failed to play correctly on the Ratatan selection screen when starting a new game.[/p]
  • [p]  Fixed an issue where the mouse wheel scroll amount was reduced.[/p]
  • [p] Fixed an error that could occur when resuming from a suspend save while Fire Elemental Force was ready to activate.[/p]
  • [p] Fixed an issue in Advanced (4beat) Input Mode where the Super Fever Skill command was not assigned and could not be used.[/p]
  • [p] Fixed an issue in Advanced (4beat) Input Mode where the Super Fever Skill command guide did not display correctly.[/p]
  • [p] Fixed an issue where changes to confirm button assignments in the Options menu were not properly reflected.[/p]
  • [p] Fixed an issue where accessory names and other text were not displaying correctly.[/p]
[p]
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[Important] Early Access v0.6.4 Hotfix Patch Notes

[h2]Bug Fixes[/h2]
  • [p]Fixed an issue where save data could become corrupted and fail to load properly. [/p]
    • [p]This occurred when the amount of data being saved grew too large after extended gameplay sessions, so we have increased the upper limit for the amount of data that can be saved.[/p]
[p]We sincerely apologize for the inconvenience caused to all players.[/p][p]We are also continuing to investigate an issue where save data deemed corrupted could be automatically deleted upon exiting the application. A fix for this issue is planned soon.[/p][p]If your save data has already been lost, please follow the steps below to attempt recovery from Steam Cloud.[/p][p][/p][h3]Restoring Save Data from Steam Cloud[/h3]
  • [p]From the list, select “View Files” for Ratatan and download the following files:[/p]
    • [p]RatataArts/Ratatan/xxxx/Ratatan1.rttn (if saved in slot 1)[/p]
    • [p]RatataArts/Ratatan/xxxx/Ratatan2.rttn (if saved in slot 2)[/p]
    • [p]RatataArts/Ratatan/xxxx/Ratatan3.rttn (if saved in slot 3)[/p]
    • [p]RatataArts/Ratatan/xxxx/RatatanSys.rttn[/p]
  • [p]
    If the downloaded files contain extra characters in their names, rename them as follows:[/p]
    • [p]Ratatan1.rttn[/p]
    • [p]Ratatan2.rttn[/p]
    • [p]Ratatan3.rttn[/p]
    • [p]RatatanSys.rttn[/p]
  • [p]Open Ratatan’s save data folder. It is usually located at:[/p]
    • [p]“C:\\Users\\(username)\\AppData\\LocalLow\\RatataArts\\Ratatan”.[/p]
  • [p]Inside the folder, open the subfolder with the most recent modification date and a numeric name.[/p]
  • [p]Move all downloaded save files into that folder.[/p]
    • [p] If data already exists, overwrite it.[/p]
  • [p]Launch the game and check if your save data has been restored.[/p]
    • [p]If it has not been restored, try the steps again from the beginning or attempt using a different folder.[/p]

Early Access v0.6.3 Release Notes

[p][dynamiclink][/dynamiclink][/p]
Updates
[p][/p][h2]Highlights[/h2][p]Super Fever Tech[/p][p]Ratatan units can now unleash the Super Fever Tech.[/p]
  • [p]Unlock it from the Quest Board.[/p]
  • [p]When the Tension Gauge is full, input the specified Rhythm Command to consume all Tension and activate.[/p]
[p]Per-unit Super Fever Techs[/p]
  • [p]Harigittan — “Hoglet Hold”[/p]
  • [p]Builds a tower that blocks enemy movement and attacks. You can also stand on it as a platform.[/p]
  • [p]Nyandola — “Mew Mew Mania”[/p]
  • [p]For a set time, increases Move Speed and Attack Power of Ratatan and Cobun within range.[/p]
  • [p]Mimizukyun — “Frosty Feathers”[/p]
  • [p]Fires multiple ice arrows forward, dealing damage and applying Freeze.[/p]
  • [p]Keroronpa — “Bop & Drop”[/p]
  • [p]Drops multiple bombs from above, damaging a wide area.[/p]
  • [p]Pyokorappa — “Sassy Symphony”[/p]
  • [p]Fires multiple musical notes in an arc that explode on hit.[/p]
  • [p]Kamonelo — “Cuddle Canopy”[/p]
  • [p]Places a barrier that nullifies projectiles and grants a damage-taken reduction buff to allies in range.[/p]
  • [p]Mashuma — “Fungal Fallout”[/p]
  • [p]Spawns a giant mushroom that scatters spores, creating a damage-over-time area.[/p]
  • [p]Buttonda — “Piggy Palisade”[/p]
  • [p]Expands a self-centered barrier that nullifies projectiles and grants a Critical Rate up buff to allies in range.[/p]
[p]World Event: Treasure Chance[/p][p]Powerful foes can trigger treasure chests to appear, yielding more rewards.[/p][p]Accessories for Cobun[/p]
  • [p]You can now equip Accessories on Cobun from the Squad/Formation screen.[/p]
  • [p]Accessories change a Cobun appearance and grant stat-up effects.[/p]
  • [p]Obtainable as enemy drops, etc.[/p]
[p]Random Match: Room List[/p][p]A room list is now displayed in Random Match. In a future update, you’ll be able to join a specified room.[/p][p]Save-Data Backup[/p][p]If the primary save becomes corrupted, the game will automatically load from a backup.[/p][p][/p][h2]Battle[/h2][h3]Balance Adjustments[/h3]
  • [p]Adjusted the damage formula.[/p]
  • [p]Fixed an issue where guarding under specific conditions could reduce damage to 1.[/p]
  • [p]Updated the formula in line with the Super Fever Tech introduction.[/p]
  • [p]Adjusted the size of telegraph markers shown before enemy attacks to better match actual hitboxes, making dodges easier to read.[/p]
  • [p]In high-difficulty battle phases, increased spacing between enemies to reduce dense clustering.[/p]
  • [p]Adjusted projectile hitboxes on ranged enemies to make them easier to avoid.[/p]
[p]Enemy/Boss tweaks[/p]
  • [p]World 1 — Bonbobon[/p]
  • [p]World 3 — Lord Rosham Bo[/p]
  • [p]World 4 — Chillwarden[/p]
  • [p]Subspecies Boss — Tornado-Wagoon[/p]
  • [p]World 1 — The Jolly Hermit: Adjusted rear-side hurtbox so Cobun attacks don’t whiff.[/p]
  • [p]World 3 — Rock’n Golem / Full-Meta Golem: Attacks now align with the beat.[/p]
  • [p]World 4 — Rock'n'yeti: Attacks now align with the beat.[/p]
  • [p]World 5 — Portageist: Lowered HP, reduced projectile speed, and adjusted move/attack intervals.[/p]
  • [p]World 5 — Boneless Bear: Lowered HP.[/p]
[p]Multiplayer[/p]
  • [p]Welcome Mode is now disabled in Multiplayer.[/p]
  • [p]After deploying, it can no longer be toggled ON from Options.[/p]
  • [p]Mixing players with different Welcome Mode settings caused unintended balance, so it is disabled during Multiplayer.[/p]
[p]Economy[/p]
  • [p]Divine Draw no longer dispenses Tokens.[/p]
  • [p]Token payout vs. draw cost allowed more pulls than intended.[/p]
  • [p]It also led to more shop upgrades than intended. To restore balance, Tokens will not be dispensed from Divine Draw.[/p]
[h3]Ratakaruta[/h3]
  • [p]You can now Reroll Ratakaruta.[/p]
  • [p]Pay Tokens to change the obtainable Ratakaruta card.[/p]
  • [p]Token cost increases with successive rerolls.[/p]
[p]Element: Fire[/p]
  • [p]Adjusted the conditions/effects of low-HP trigger cards to better fit current balance.[/p]
  • [p]Increased card effects that boost Normal Attack and Hustle Tech.[/p]
  • [p]Big Booms: Increased explosion damage.[/p]
  • [p]Burning Bravery (multiplier up): 25% / 50% / 75% / 100% → 30% / 60% / 90% / 120%.[/p]
  • [p]Burning Boost (condition relaxed): HP ≤30% → HP ≤50%.[/p]
  • [p]Burning Blast+ / Hustle Blast+ (power up):[/p]
  • [p]Before: 15%+3% / 25%+6% / 35%+9% / 45%+12%[/p]
  • [p]After: 20%+4% / 30%+8% / 40%+12% / 50%+16%[/p]
[p]Element: Poison[/p]
  • [p]To make damage from Poison feel more impactful, increased card effects that boost Normal Attack and Hustle Tech.[/p]
  • [p]Status Ailment: Poison — Duration increased; damage increased (fixed-value damage).[/p]
  • [p]Duration: 6s → 18s[/p]
  • [p]DPS: 16/20/24/32 → 20/24/32/40[/p]
  • [p]Total: 96/120/144/192 → 360/432/576/720[/p]
  • [p]Toxic Boost — When attacking a poisoned enemy, 20% chance to deal additional damage. 75%/100% → 150%/200%.[/p]
  • [p]Poison Pinch — Poison tick frequency becomes faster. 20%/25%/33%/50% → 25%/33%/50%/75%.[/p]
[h2]Out-of-Game[/h2]
  • [p]Ratatan Dock: Added new upgrades related to Just Input.[/p]
  • [p]Increased Tension Gauge gain on Just Input.[/p]
  • [p]Increased MP recovery on Just Input.[/p]
  • [p]RataPort: Extended demo line display times.[/p]
  • [p]Oath Level now increases rewards:[/p]
  • [p]• Lv1–3: In addition to normal drops, extra drops are rolled.[/p]
  • [p]• Lv4+: Plus boss-exclusive drops are rolled.[/p]
[h2]UI/UX[/h2]
  • [p]Boss HP Bar now displays localized names.[/p]
  • [p]When resuming from a Suspend Save, you can choose to resume or discard and return to base.[/p][p][/p]
Bug Fixes
  • [p]Weapon “Stonewall Spear” now drops at the correct rarity.[/p]
  • [p]Fixed a crash when deploying a squad with 18 specific Cobun.[/p]
  • [p]Fixed an issue where if the owner was forcibly disconnected in Multiplayer, participants couldn’t operate.[/p]
  • [p]Fixed barrier value not carrying over after resuming from a Suspend Save.[/p]
  • [p]Fixed unintended load caused by rapidly switching screens in Craft.[/p]
  • [p]Fixed overlapping control guides in certain screens.[/p]
  • [p]Fixed rounding issues causing damage/heal to be truncated.[/p]
  • [p]Fixed a tutorial softlock when repeatedly entering commands other than those specified.[/p]
  • [p]Fixed Decorune names showing unintentionally when switching Cobun in the Formation screen.[/p]
  • [p]Fixed a Craft issue where, if multiple presets existed, pressing Initial Equipment did not reset certain presets.[/p]
  • [p]Fixed an issue where Oath items were sometimes not granted after clearing a world.[/p]
  • [p]Fixed Ratatan Dock item “clean block” sometimes not functioning correctly.[/p]
  • [p]Fixed Poison Elemental Force sometimes not functioning.[/p]
  • [p]Fixed “GET” being displayed on Ratakaruta pickup screens after resume, even when a swap occurs.[/p]
  • [p]Fixed certain buffs lingering after Cobun death.[/p]
  • [p]Fixed barriers exceeding their maximum.[/p]
  • [p]Fixed an issue where certain Ratakaruta displayed incorrect effect values in their descriptions.[/p]
  • [p]Fixed an issue where rhythm commands could sometimes be performed after clearing a wave.[/p]
[h2]Known Issues[/h2]
  • [p]Multiplayer desync may occur between players.[/p]
  • [p]After switching selection in Multiplayer, some players’ doors may not open, blocking progress.[/p]
  • [p]Barrier values may not carry over after leaving via Suspend Save and resuming.[/p]
  • [p]Boss Defeat SFX may play after resuming from a Suspend Save.[/p]
  • [p]When obtaining Ratakaruta after resuming from a Suspend Save, “Swap” may be displayed as “Get.”[/p]
  • [p]Some pop-up help images still show older in-game art.[/p]
  • [p]The control guide at the bottom of the screen can overlap with another screen’s guide.[/p]
  • [p]With a barrier active, obtaining Max HP Up may increase remaining barrier.[/p]
  • [p]Crashes may occur when accessing Freeze-related buffs during play.[/p]
  • [p]In Multiplayer, joining players may start the next phase in front of the door.[/p]
  • [p]Repeated use of the Altar may cause rendering issues.[/p]
  • [p]An error may occur if the RataPort is left idle for an extended period.[/p]
  • [p]“Son Jammer” clones may move through doors.[/p]
  • [p]Entering specific Rhythm Commands may occasionally cause input to lock.[/p]
  • [p]Opening the Info screen at certain timings may make it unclosable.[/p]
  • [p]Effects of specific Fire-element Ratakaruta may fail to trigger.[/p]
  • [p]Battles may fail to end after defeating the final enemy with Ratakaruta “Big Booms.”[/p]
  • [p]After resuming from a long pause in the tutorial, bosses may remain idle.[/p]
  • [p]Cobun may continue guarding unintentionally.[/p]
  • [p]Upon Cobun death, another Cobun’s appearance may be applied.[/p]
  • [p]Cobun may leave the follow state and stop progressing when using an Altar.[/p]
  • [p]Camera position may be offset at the start of a stage.[/p]
  • [p]Certain Ratakaruta effects may double when using Suspend Save.[/p]
  • [p]Boss Defeat SFX may play after resuming from a Suspend Save.[/p]
  • [p]Text in Altar UI may be clipped.[/p]
  • [p]RataAbility and Decorune effects may not apply to Shock caused by Chain Lightning.[/p]
  • [p]Key Config conflicts may make input unusable.[/p]
  • [p]Overlapping screens in RataPort events may prevent closing the affected screen.[/p]
  • [p]Dropped items may fall off-screen and disappear.[/p]
  • [p]Window size may revert to default after changing and saving Options.[/p]
  • [p]Items placed in the Interval may change after resuming from a Suspend Save.[/p]

Ratatan Cumulative Sales Exceed 100,000 Copies!

Developed by Ratata Arts and published by Game Source Entertainment, the Rhythm × Roguelike action game Ratatan has surpassed 100,000 cumulative sales worldwide during its Early Access period!
We would like to express our heartfelt gratitude for all the passionate support from players around the globe.

Since its Early Access launch on September 19, 2025, on Steam, the game has been praised internationally for its unique fusion of rhythm-based combat and its cast of colorful, charming characters.



[h2]■ Major Update Scheduled for October 30 (Thursday) at 12:00 PM JST![/h2]
This update, titled the “October Update,” follows the roadmap previously shared with players and will introduce various new features and improvements, including highly anticipated special skills exclusive to each Ratatan.

[previewyoutube][/previewyoutube]

[h2]Update Contents (Planned)[/h2]

[h3]SUPER FEVER Skill[/h3]
Unique special skills for each Ratatan make their debut!
Build up your FEVER gauge and unleash powerful attacks—team coordination in multiplayer will be key.



[h3]Cobun Accessory Equipment[/h3]
Customize your favorite Cobuns with accessories like ribbons and hats.
Express your style and enhance the fun through visual customization.



[h3]New Random Events (Treasure Chest Rooms)[/h3]
New opportunities to discover treasure appear during your journey.
Defeat challenging enemies to earn valuable loot and generous rewards!



[h3]Random Matching Improvements[/h3]
Improved matchmaking UI now displays active sessions.
This is the first step in a series of updates aimed at creating a smoother multiplayer experience.



[h3]Ratakaruta: New Reroll Function[/h3]
A new reroll feature allows for greater freedom in card selection, enhancing deck-building strategy.



[h3]Various Balance Adjustments and Bug Fixes[/h3]

[h2]Looking Ahead[/h2]
We will continue to make improvements and updates based on everyone’s valuable feedback.
Your voices shape the future of Ratatan—thank you for your continued support!

[h3]Reference Links[/h3]
Steam Store:
https://store.steampowered.com/app/2949320/Ratatan/

Roadmap:
https://store.steampowered.com/news/app/2949320/view/706624027566801323

Early Access FAQ:
https://store.steampowered.com/news/app/2949320/view/706624027566801483