About the Game
Ratatan is a rhythm roguelike action game that combines rhythm games and side-scrolling action, with online co-op gameplay supporting up to 4 players.
An intense battle unfolds with over 100 characters fighting in a massive melee.
Defeat the enemies by riding the rhythm of Ratatan’s catchy, toe-tapping soundtrack in this delightful, heartfelt adventure!
Welcome to Rataport!
In the vast and tranquil sea, there is an island as lively as a toy box. The name is "Rataport" On the island, a strange animal-like creature called Ratatan lives happily with their friends. Despite their different appearances and personalities, they share a common dream. Which is go to “The Everafter". And meet "The Goddess" who is said to live in there. As heroes who carry the hope of all, the Ratatans embark on a journey to The Everafter. No matter how many times they failed, they will never give up and dreamt of meeting her one day.
Rhythm action
Feel the beat and use rhythm sequences in time to order your Cobuns in the direction you want them to go.
Since the Ratatans can be moved freely, your judgement to decide where to give orders, where to position the ratatan, and when to retreat is critical.
2D animation
We want to emphasize the unique performance of 2D animation and put lively personality into the action.
Screenshots
6 images
Version Information
Steam Patch Notes
Official update history
DLC
Fixed an issue where purchased and activated DLC was not being applied correctly in-game.
Players who have already purchased the DLC will receive the corresponding items and content after updating.
We apologize for any inconvenience this may have caused.
Updates
Added voice and sound effects to Dark Ratatan battles.
Updated the credits (thank you for everyone’s patience!).
If you couldn’t find your name, please send us an email at [email protected]
Bug Fixes
Fixed an issue where Cobun would stop moving and halt progress under specific conditions, such as during the Target Timer.
Fixed an issue in the Altar Hall where the Healing Fountain would overlap with the Altar.
Note: The Healing Fountain will no longer appear in the Altar Hall.
Fixed an issue where visual effects were not displaying correctly for certain attacks.
Fixed an issue where the normal attack damage multiplier from Nyandola's Super Fever Tech "Mew Mew Mania" was not applied to 'Good' judgments in Rhythm Commands.
Fixed an issue in World 1 where Squidly Pete's pull attack would trigger even when frozen.
Fixed an issue where the settings for Decorune attached to accessories dropped by Dark Ratatan in Episode 2 did not function correctly.
Bug Fixes
Fixed an issue where the game crashed upon launch on Steam Deck.
Please note that as Steam Deck and Linux are not currently officially supported, this is a provisional fix.
\ Regarding Progression to Episode 2
We have received feedback that players are unable to proceed to Episode 2 or that the unlock conditions are unclear. We apologize for the inconvenience. To unlock Episode 2, the following two conditions must be met:
Clear Episode 1 (Complete up to World 5 for the first time)
Raise the "Goddess’ Game" Oath Level to 1 or higher
After applying this update, you will be able to proceed by starting the game with the above conditions met.
Bug Fixes
Scenario
Fixed an issue where Episode 2 would sometimes not appear even if the conditions were met.
Fixed an issue in the Episode 2 tutorial where the text condition "Raise Covenant Level to 1 or higher" was not displayed in some languages.
Stage Gimmicks / Demos
Fixed an issue in Episode 2 where the animation for "Dark Ratatan" appearing was not displayed correctly.
Fixed an issue in Episode 2 where BGM would overlap if the "Dark Ratatan" demo occurred during an interval.
As a temporary measure, only the original interval BGM will play.
We plan to implement a dedicated BGM for this in a future update.
Fixed an issue where Ratatan was able to move at the start of the ending.
Fixed an issue where the playback conditions for some Tangletung demos were unintended.
Ratakaruta
Ratakaruta Duo "Ice Blight"
Fixed an issue where some enemies' HP would recover when unfreezing.
As a temporary measure for this fix, the following specification change has been made:
Change: HP reduction caused by this effect is no longer treated as "damage" by the system.
Impact: Effects such as those that "activate upon taking damage" will not apply.
We plan to revert this in a future update so that it is treated as normal "damage" again.
Network / Multiplayer
Shortened the phase transition time (the time from when the gate opens until movement begins).
Mitigated an issue where frequent disconnections from the session occurred in multiplayer games involving players in specific network environments.
Known Issues
We are currently investigating an issue where the game fails to launch on Steam Deck.
We plan to address this in a future update. We apologize for the inconvenience and appreciate your patience.
Update
Super Fever Skills now grant Super Armor.
Super Fever Skills will no longer be canceled by knockback or status effects caused by enemy attacks.
Improved gameplay experience by preventing the sudden drop in BGM intensity from reducing player enjoyment.
Adjusted Super Fever Skill behavior so that not all Tension Gauge is consumed upon activation; a small portion will now remain.
BGM now transitions smoothly with a fade after using a Super Fever Skill.
Extended the display time of item rewards after opening a treasure chest during 'Treasure Chance'.
In Random Match lobbies, players who remain inactive for 4 minutes will now automatically leave the lobby.
This prevents multiplayer sessions from starting due to idle players.
Added a message that appears when attempting to join a Random Match and no available rooms are found.
In multiplayer lobbies, the player who becomes the room owner will now have an owner icon displayed next to their status.
Bug Fixes
Fixed an issue where save data could be lost if it failed to load properly at startup.
Fixed a crash that could occur when freeze and burn effects were applied simultaneously.
Fixed an issue where certain visual effects did not display as intended.
Fixed a bug where obtaining Ratakaruta under specific conditions in multiplayer could cause an error.
Fixed an issue where Raindrop Hop would hit enemies and fail to explode upon ground impact.
Fixed COMtan’s movement speed when passing through the Goodie Gates in multiplayer.
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.
Fixed an issue where character voices sometimes failed to play correctly on the Ratatan selection screen when starting a new game.
Fixed an issue where the mouse wheel scroll amount was reduced.
Fixed an error that could occur when resuming from a suspend save while Fire Elemental Force was ready to activate.
Fixed an issue in Advanced (4beat) Input Mode where the Super Fever Skill command was not assigned and could not be used.
Fixed an issue in Advanced (4beat) Input Mode where the Super Fever Skill command guide did not display correctly.
Fixed an issue where changes to confirm button assignments in the Options menu were not properly reflected.
Fixed an issue where accessory names and other text were not displaying correctly.
Bug Fixes
Fixed an issue where save data could become corrupted and fail to load properly.
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.
We sincerely apologize for the inconvenience caused to all players.
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.
If your save data has already been lost, please follow the steps below to attempt recovery from Steam Cloud.
Restoring Save Data from Steam Cloud
Close the game.
Log into Steam and access “store.steampowered.com/account/remotestorage”.
From the list, select “View Files” for Ratatan and download the following files:
RatataArts/Ratatan/xxxx/Ratatan1.rttn (if saved in slot 1)
RatataArts/Ratatan/xxxx/Ratatan2.rttn (if saved in slot 2)
RatataArts/Ratatan/xxxx/Ratatan3.rttn (if saved in slot 3)
RatataArts/Ratatan/xxxx/RatatanSys.rttn
If the downloaded files contain extra characters in their names, rename them as follows:Ratatan1.rttn
Ratatan2.rttn
Ratatan3.rttn
RatatanSys.rttn
Open Ratatan’s save data folder. It is usually located at:
“C:\\Users\\(username)\\AppData\\LocalLow\\RatataArts\\Ratatan”.
Inside the folder, open the subfolder with the most recent modification date and a numeric name.
Move all downloaded save files into that folder.
If data already exists, overwrite it.
Launch the game and check if your save data has been restored.
If it has not been restored, try the steps again from the beginning or attempt using a different folder.
Notice Regarding Language Display
We have corrected the supported language display on the Steam store page from “Spanish – Spain” to “Spanish – Latin America.”
This change was made to resolve a discrepancy between the language shown on the store page and the actual language displayed in the game.
We sincerely apologize for any inconvenience caused by this labeling error.
Thank you for your continued support for RATATAN.
Bug Fixes
For enhanced security, we have rebuilt the application using a patched version of Unity.
This update addresses the CVE-2025-59489 vulnerability.
Fixed an issue where the number of available deployments increased after resuming from a suspended save.
Update
The Ratatan will now speak when first selecting them in the formation screen.
Improved save data stability.
Bug Fixes
Fixed an issue where saving mid-battle with a buff active could prevent the game from resuming.
Fixed an issue where Cobun would behave incorrectly after resuming a mid-battle from a save.
Fixed an issue where effects that constantly reduce max HP (such as with some Decorunes) could reduce HP to 0 instead of stopping at 1, causing Cobun to stop moving.
Fixed an issue where multi-hit Cobun attacks did not perform critical hit checks on each hit.
Fixed an issue where, if the Ratakaruta selection screen remained open until time ran out, the game would proceed directly to the next phase.
Fixed an issue in multiplayer where other players’ voices would not play.
Volume can now be adjusted in the sound options.
Important Notice
(Updated: 2025/09/26 11:00 JST)
The issue in Ver.0.5.9 that caused progression to become impossible has been fixed, and the game has been re-released as Ver.0.5.10.
We apologize for the inconvenience caused to all players.
(Updated: 2025/09/25 12:40 JST)
A critical progression-blocking bug was found in Ver.0.5.9, so we have rolled back to Ver.0.5.5.
If you have already updated to Ver.0.5.9, please update again to revert to Ver.0.5.5.
We will announce the re-release of Ver.0.5.9 once the fix is complete.
Update
Added two types of Weapons to the drops from the Altars in World 4 and World 5.
If you’re lucky, you might get something interesting from the Goddess Lottery.
Secret items obtained in Ver.0.5.9 must be acquired again in Ver.0.5.10.
We apologize for the inconvenience and thank you for your understanding.
In Single Player, it is now possible to skip the Ending.
Hold down a key to skip the event and return to Rataport.
Optimized background textures during gameplay to reduce data size and rendering load.
Adjusted terrain across all Worlds to reduce elevation differences.
Updated Credits.
Bug Fixes
(Updated: 2025/09/26 11:00 JST) Fixed a bug where the game could become unplayable if you opened the Formation screen after playing an event in the lobby.
Fixed a bug where the NAT Type was not being diagnosed correctly when joining Multiplayer.
If the environment is judged as difficult for Network Multiplayer, please review your router’s security settings or try another internet connection.
Fixed a bug where returning to the Lobby before the Owner in Multiplayer would cause you to be kicked from the session.
Fixed a bug where other players were not syncing correctly during the Ending in Multiplayer.
Improved synchronization of Cobun movement between players in Multiplayer.
Improved stability when a joining player obtained a Cobun in Multiplayer.
Fixed a bug where if a defeated Cobun was falling and the Wave was cleared, it would get buried in the ground and be unable to return.
Fixed a bug where Cobun would sometimes fail to follow after clearing a Wave, causing progression to become impossible.
Fixed a bug where Elemental Force would remain active if the player died while it was triggered.
Fixed a bug where the icons for the Player Upgrades From the Brink and Seven Stumbles, Eight Rises would disappear from the Player Status after being consumed.
Due to incorrect rarity, stats, Decorune slots, and required experience, the weapon Whirlwind Spear Zonzacrin has been temporarily made unobtainable via drops and crafting.
It will become obtainable with the correct rarity in a future update.
Weapons already obtained will remain in your inventory.
Fixed a bug where the death effects of certain Bosses were not displayed correctly.
Fixed a bug where the effect description text of the Player Upgrades From the Brink and Seven Stumbles, Eight Rises did not match their actual effects.
Corrected some text displayed in Decorune and UI.
Added Frame Rate Cap
When vertical sync was turned off, the frame rate would increase excessively, causing high CPU usage. To address this, a frame rate cap has been implemented.
When vertical sync is off, the frame rate will now be capped at 240 FPS.
Current Release
Build 26103123
Uploaded Nov 11, 2026
System Requirements
How to Install
game.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
Needed when extracting (WinRAR / 7-Zip) — not a site login.
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