Once Upon a Katamari

Once Upon a Katamari is an adventure game developed by Rengame and released in 2025. It was published by Bandai Namco Entertainment. It is available on Nintendo Switch 2, PlayStation 5, Xbox Series X|S, Nintendo Switch and PC (Microsoft Windows). It runs on Unity.

It is played from a third person perspective. Its themes are action, comedy, fantasy and historical. It is a single-player game with no multiplayer component. Available modes: Multiplayer and Single player. There are 38 achievements to unlock.

Once Upon a Katamari holds a critic score of 84 out of 100. That places it above 81% of the 7,527 rated adventure games in our database, which average 72. Games released in 2025 averaged 78, so it scored 6 points above the year average.

The minimum specification calls for Intel Core i3-8100 /AMD Ryzen 3 3100, 6 GB RAM and Nvidia GeForce GTX 550 Ti [1 GB] / AMD Radeon HD 7770 [2 GB]. An 6GB memory requirement is modest by current standards; most machines sold in the last five years clear it. Install size is roughly 6GB. Both tiers are compared side by side on the requirements page, and you can check your own parts against them without installing anything.

Full requirements and PC checker →

Once Upon a Katamari launched on 24 October 2025, within three weeks of Battlefield 6, Vampire: The Masquerade - Bloodlines 2, ARC Raiders and The Outer Worlds 2. It reviewed better than 2 of the 4. It arrived 5 years into the PlayStation 5's life, so it was built for hardware developers already knew well.

Released around the same time: Battlefield 6, Vampire: The Masquerade - Bloodlines 2, ARC Raiders, The Outer Worlds 2.

We have not confirmed any working cheat codes for Once Upon a Katamari yet. Rather than reprint a list we have not tested, this section stays empty until one is verified.

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