Originally announced under the working title “Project JabberWocky,” Ratatan is produced by Kazuto Sakajiri and directed by Patapon designer Hiroyuki Kotani, with art illustrated by Nelnal, and featuring music by Patapon sound designer Kemmei Adachi. The Original Soundtrack Demo is available for free download in MP3 and FLAC file formats.
"We’ve chosen to release Ratatan into Early Access because we want to involve even more players in shaping the final game," writes Sakajiri. "We believe that gathering broad feedback is essential to help us improve the stability of online multiplayer, fine-tune game balance and difficulty, and enhance overall usability—including controls, flow, and playability."
Preview music tracks are also streaming on SoundCloud and the developer's YouTube channel, co-composed by Sadaki Naoe. A special guest track by David Wise will also appear in the game.
From the Steam product page:
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. Let's defeat the enemies together with the dynamic rhythmic music.YouTube - RATATAN
アーリーアクセス配信日決定!
— RATATAN (ラタタン) (@ratatan_game) August 15, 2025
2025年9月19日(金)0:00 JST
Kickstarterから始まった旅が、ついにSteamで動き出します。
Early Access Release Date Announced!
September 19, 2025 (JST)
The journey that began on Kickstarter finally comes to life on Steam.https://t.co/tl3if3dD8y… pic.twitter.com/pI371aar2S