Kingdom Hearts: Rodent's Havoc
| Kingdom Hearts: Rodent's Havoc | |
| Developer(s) | Square Enix and h.a.n.d |
| Publisher(s) | Square Enix and Disney Interactive |
| Distributor(s) | Sony Interactive Entertainment |
| Director(s) | Yoko Taro |
| Producer(s) | Shinji Hashimoto |
| Composer(s) | Yoko Shimomura |
| Platform(s) | PSP(2008) PSP Vita(2011, Backwards Compatibility) PS3(2014) PS4(2014) PS5(2020) |
| Genre(s) | *Action RPG
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| Series | Kingdom Hearts |
| Age Rating(s) |   
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| Storage Needed | 1.68 Gigabytes |
Kingdom Hearts: Rodent's Havoc, also just simply called Rodent's Havoc, is a 2008 RPG Spinoff of the Kingdom Hearts Series that released on the PlayStation Portable. It was developed by Square Enix and h.a.n.d while being published by Square Enix and Disney Interactive. The game takes place before Act 1 of the Freaky Saga and right after the Revelations Arc as a continuation of Dr. Hämsterviel's story where it was left off. The game was released on October 14th, 2008 (JP), November 18th, 2008 (NA), and on February 5th, 2009 (EU). The game starts with Dr. Hämsterviel as the main protagonist instead of Sora who is absent from the game, Goofy and Donald are also absent and being replaced by two support characters called Fassad and Fenneko to take their cover. Known for its psychological themes, strange narrative devices, and experimental tone, Rodent's Havoc is widely considered one of the strangest entries in the Kingdom Hearts series.
Development[edit | edit source]
Early Production[edit | edit source]
Following the global success of Kingdom Hearts II, Square Enix began exploring side projects that could extend the franchise onto portable platforms. The PlayStation Portable, launched in late 2004 in Japan and 2005 globally, was a major target.
While Tetsuya Nomura remained fully focused on other projects during that time, a proposal emerged internally, create a tonally experimental Kingdom Hearts game that would explore the themes of morality, memory, and identity—but with no Sora, no Keyblades, and minimal Disney hand-holding. Instead he got Shinji Hashimoto to be the Producer of the game.
Yoko had just wrapped development on Drakengard 2 (which he wasn’t the main director for) and was pitching darker, more philosophical stories to Square Enix. Someone within the KH team, reportedly Shinji Hashimoto, suggested giving him free rein over a side project. During this time, Yoko Taro was making like a big project(more information on the Freaky Saga page) and decided to make this as a side-project.
From day one, Yoko Taro was adamant:
- “We will not use Sora.”
- “We will not romanticize Disney.”
Yoko was handed an internal team of KH-adjacent devs and the development team of h.a.n.d, with Yoko Shimomura returning for soundtrack duties, assisted by Takeharu Ishimoto and a few guest tracks by Hideki Naganuma for a few tracks in the game.
The first character that was pitched was to be Flint, husband of Hinawa, as the game would take a lot of inspiration from the cancelled N64 game that would lead to Kigdom Hearts. However the team wanted someone that was actually in the franchise so they chose on Dr. Hämsterviel who during this time was already getting attraction from the Pigmask Arc that dropped as well as his role in Kingdom Hearts II as an secondary antagonist. Fassad was quickly added but the third person in the game was confusing as Yoko wanted Gantu to be the final role but some writers preferred Fenneko from the recent Pigmask Arc who was teasing a love interest between them so she was added and Gantu would not be a main playable character but would have a presence in the story.
Code name: KH: Sharp Edge
Mid Production[edit | edit source]
Many concept art depicts the 3 in an more goofy-exaggerated art style that we can see in the game's full release albeit by not a lot. Many concepts were created and fleshed out during production of the game also. This is where the title would actually change and be the same one in the final release.
During production, Yoko Taro created Dr. Loboto specifically for this game. Inspired by real-life neurosurgical practices and horror fiction, Loboto is a dentist-turned-psychologist who performs lobotomies on captured experiments.
- Dr. Caligosto Loboto was made to be a standout for the game as he's just doing this for the extra cash as an unlicensed dentist so he isn't Pure Evil. Yoko Taro invented him specifically for Rodent’s Havoc as a counter to KH’s usual “goofy villain” tone.
- He was originally written as a deranged dentist which is still used in the story, but morphed into a neurosurgical sadist who performs lobotomies on sentient experiments to erase memory and soul.
- Loboto’s tools were inspired by real 1950s surgical catalogs Yoko collected for research.
Yoko Taro also made Experiment 621 (nicknamed Chopsuey) more fleshed out enough to be called an original character for him as the character was never featured on screen outside of deleted concepts. Yoko Taro took the loose threads of this “failed fusion experiment” and completely re imagined him into the game’s primary villain.
| “ | Yoko Taro, 2007 internal concept doc | ” |
-He is the shame of a system that manufactures living things to be disposable. He is insecure, malformed, and obsessed with perfection—and in that way, he mirrors the entire universe’s fear of chaos. | ||
There was also Dark End who was not part of Disney’s original lineup of experiments. It was a wholly original creation by Yoko Taro, invented for the final act of the game as a bio-apocalyptic fail-safe developed by Delia, Dr. Fuck You, and Dr. Rizzler Zesticles by stealing Jumba's ideas while captive. It would be refrenced through the whole game in hints and intermissions but it would show up in Chapter 7 as it's boss.
The game was now developing a lot of stuff for the maps and characters.
Late Production[edit | edit source]
Around late 2007, as the game neared alpha, Sony Computer Entertainment Japan expressed a desire to keep the game Japan-exclusive due to its surreal and grotesque tone (a harder sell in North America for a Disney brand). Heavily stylized game with a lot of Japanese tones in the game(which didn’t test well with U.S. focus groups) and the emphasis on gameplay loops like repetition, side-quests, and cryptic lore.
This deeply frustrated Yoko Taro and the Square Enix production team, who had developed the story to be universal and not some forgottened Japan-only Kingdom Hearts game that nobody will remember. In early January 2008, Square Enix held a tense internal summit between Japan, North America, and Europe publishing leads. Marketing data from test screenings in France and Canada showed surprising interest from older teens who grew up with the first Kingdom Hearts game but wanted something darker. After pushback, Sony reluctantly approved a global release on the condition that localized versions tone down a little bit for specific audio logs and dark imagery.
Internally, Square Enix prototyped a PS2 version of Rodent’s Havoc as early as Q4 2007. This port was meant to launch a few months after the PSP version (Q2 2009), feature upscaled textures, 60 FPS combat, and dual-stick support control scheme, and use the KH2 engine as a foundation.
However, several issues led to its cancellation:
- Sony's shifting priorities toward PS3 and PSP
- Localization complexity for a second version on outdated hardware that was almost a decade old at the time.
- Internal resistance from Sony Japan, who felt the game "wouldn't resonate internationally"
The PS2 build was about 40% complete before Square Enix shelved it permanently.
The game was getting completion by Yoko Taro who deemed this would be one of the best games on the PSP that made it more unique than the DS as Sony's E3 presentation would publically announce the game worldwide with more footage other than some teasers. Even there was a demo of the game and an opening for the PSP game in the beginning of the introduction of the song then Yoko Taro shows up with a Chopsuey plush and introduces the game with trailers and even a demo available in the booths. People knew that this game existed from Square Enix's blogs but the many fans thought it would be shit due to Sora and other main characters wouldn't be in the game so it was mixed there as the release trailers rolled out as Yoko Taro's team would complete the game two months later and then got released albeit some cut content had to be deleted due to the game having a set to the Holiday of 2008.