Patapon creator Hiroyuki Kotani’s Ratatan leaves Early Access with its story finally complete

There are few interfaces in games as strange, or as durable, as a drum. In Patapon, Hiroyuki Kotani’s cult rhythm strategy series for Sony’s PSP, you never touched your soldiers: you beat out short commands and a tribe of one-eyed warriors marched, struck or retreated on the beat. The idea outlived its handheld. Ratatan, the new game from Kotani and fellow Sony Japan veterans at Ratata Arts, is built on the conviction that the drum still has something to say, and its full release is the moment that conviction finally gets a complete story to carry.

The core loop is familiar in spirit. You lead the character Ratatan and her companion Cobun into an unknown world, stepping in time with the music, and every command you issue has to land on the beat. What changes is the shape around it. Where Patapon marched toward fixed fortresses, Ratatan wraps its rhythm in roguelike action: side-scrolling runs that reshuffle with every attempt, melees in which more than a hundred characters collide on screen, and online co-op for up to four players sharing the same tempo.

A column of Cobun marches through a jungle toward a floating jellyfish creature in Ratatan — Image: Ratata Arts / Game Source Entertainment

That is why this launch matters more than most Early Access graduations. Ratatan’s road has been public and bumpy: a Kickstarter that hit its goal in under an hour, then a demo whose tutorial, interface and rewards drew enough criticism that the team delayed Early Access to rework them, before opening on Steam in September 2025. Version 1.0 is where the experiment has to resolve. It adds Chapters 3 and 4, a final world and a formidable last boss, and gathers every Dark Ratatan, the archnemeses who until now appeared one at a time, into a single, punishing onslaught. New features and performance adjustments round out the update.

In the launch announcement, the team talks about the finish line with unusual candour. Kotani admits he “never imagined that completing a game would be such a dramatic process.” Composer Kemmei Adachi, whose music defined Patapon and LocoRoco, describes setting out to create “music that would allow everyone playing to journey together in a happy mood,” which is as precise a design brief as a rhythm game can have: here the soundtrack is not decoration, it is the control scheme. Producer Kazuto Sakajiri thanks Kickstarter backers and Early Access players, and presents Ratatan as a brand-new world with its own characters, open to Patapon fans and newcomers alike. Director Kenei Nakasha and character designer Nelnal complete the core team.

Fever mode erupts as the Ratatan army battles a giant crab-shaped pirate ship on a beach — Image: Ratata Arts / Game Source Entertainment

Ratatan is developed by Ratata Arts and published by Hong Kong-based Game Source Entertainment. Version 1.0 is out now on PC via Steam, Nintendo Switch 2, PlayStation 5 and Xbox Series X|S. Digital editions start at $34.99, with the Deluxe Edition and the physical console edition at $39.99. The game is rated ESRB 10+ and ships with subtitles in ten languages, among them Japanese, Korean, Simplified and Traditional Chinese, Spanish and European Portuguese.

Kotani once taught a generation of handheld players to think in beats rather than buttons. Ratatan’s ending is the real test of whether that language can carry a whole new world, and not just the memory of an old one.

Tags: Marcus Mariota, rhythm games, Game Source Entertainment, Hiroyuki Kotani, Kemmei Adachi, Patapon