Once Upon a Katamari - Systems
The systems of Once Upon a Katamari are the series' rolling rules plus the time-travel framing built on top of them. The katamari is steered as two tracks rather than a camera-relative character, size decides what can be picked up, and crowns convert individual stages into a progression gate. On top...
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· updated 2026-09-15
| Name | Type | Description | Stats | Source |
|---|---|---|---|---|
| Two-Stick Rolling | Core Control System | Each analog stick drives one side of the katamari, so forward motion is both sticks pushed the same way and a turn is one stick moving ahead of the other. | Input: Both analog sticks or two keyboard clusters Optional Scheme: Simple control option | Core mechanic from the first stage |
| Size Thresholds | Core Progression Rule | Everything in a stage has a size, and the katamari can only collect objects smaller than itself. | Rule: Collect only what is smaller than the ball Effect: Stage layout changes as the katamari grows | Core mechanic |
| Objective Types | Stage Structure | Stages are framed by their objective rather than by a single mode. | Categories: Size, timed, themed collection, fixed-size Failure Condition: Missing the target or overgrowing a fixed-size stage | Stage list across the eras |
| Crown Gating | Progression System | Three crowns are hidden in each stage and crowns, not completion, are what unlock the next levels. | Crowns Per Stage: 3 Total: 141 Gate: Level unlocks | Campaign progression |
| Era Campaign | World Structure | The story scroll has scattered the world's history, so the campaign is organised as a run through eras rather than a tour of one city. | Eras: Edo Japan, Jurassic Period, Ice Age, Ancient Egypt, American Frontier Largest Area: Edo Japan | Campaign structure |
| Cousin Hunt | Collection System | Cousins are hidden inside stages and collected by rolling over them, and each one becomes a selectable character. | Total: 68 Gate: Two late levels | Optional collection across all eras |
| Presents and Customisation | Cosmetic System | Presents found in stages unlock costume pieces, and the game adds face customisation for the Prince on top of the series' usual dress-up layer. | Presents: 39 Edition Bonus: 3 face customisation parts | Collectible and customisation menus |
| KatamariBall | Online Multiplayer Mode | KatamariBall is the sequel's new competitive mode: up to four players roll simultaneously, against each other online or against CPU opponents, and the biggest haul wins. | Players: Up to 4 Opponents: Online players or CPU Win Condition: Largest katamari | Main menu multiplayer |
| Collection Menu | Progress Tracking | A single collection screen tracks crowns, cousins, presents and the 31 story movies, so the completion state of every era is visible in one place. | Tracks: Crowns, cousins, presents, movies Movies: 31 | Main menu |
| Nintendo Switch 2 Port | Platform Feature | The Switch 2 version arrived on October 8, 2026, the same day as the Rolling Live Highlights DLC, and it adds mouse control support using the Switch 2's Joy-Con mouse mode. | Release: October 8, 2026 Added Feature: Joy-Con mouse control | Switch 2 release |
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