Codenamed Owl, the Zelda Ocarina of Time Switch 2 Remake Runs on Nintendo's ModuleSystem Engine Built Directly Off Tears of the Kingdom
Following its exclusive launch on Nintendo Switch 2 on November 5, 2026, The Legend of Zelda: Ocarina of Time Remake is already surrendering its deepest development secrets. By inspecting the game's executable files, prominent dataminer OatmealDome on X discovered that the project carried the internal codename "Owl" and was built directly out of the development pipeline of The Legend of Zelda: Tears of the Kingdom using Nintendo EPD's proprietary ModuleSystem engine.
Project "Owl": A Nod to Kaepora Gaebora That Solves a 2024 Mystery
Inside the internal directory structure compiled by Nintendo's Kyoto teams, The Legend of Zelda: Ocarina of Time Remake is labeled under the codename "Owl." The moniker is a direct tribute to Kaepora Gaebora, the wise giant owl who greets Young Link outside Kokiri Forest and guides players across Hyrule Field, Death Mountain, and Lake Hylia.
Uncovering this identifier also resolves a long-standing community mystery. Dataminers first spotted references to an unannounced Nintendo EPD project codenamed "Owl" back in late 2024. At the time, widespread fan speculation assumed the codename belonged to a new Animal Crossing entry referencing Blathers the museum curator, when in reality it was the ground-up Switch 2 remake of the 1998 N64 classic.
Nintendo's ModuleSystem Engine and Leftover Tears of the Kingdom Code
On a technical level, the file analysis confirms that the remake runs on ModuleSystem, the standardized internal game engine framework used across modern Nintendo EPD productions. This proprietary technology powers major first-party hits including The Legend of Zelda: Tears of the Kingdom, Splatoon 3, Super Mario Bros. Wonder, and Nintendo Switch Sports. However, the executable files inside Ocarina of Time Remake point to a much tighter relationship with Link's 2023 open-air adventure than merely sharing a baseline engine.
| Technical Element Discovered | Internal File Evidence | Development Significance |
|---|---|---|
| Internal Codename | Owl | Tribute to the guiding owl Kaepora Gaebora (first leaked in late 2024) |
| Core Game Engine | ModuleSystem | Nintendo EPD's unified proprietary framework for Switch and Switch 2 |
| Physics & Logic Remnants | Chemistry Engine modules | Elemental interaction systems inherited from Breath of the Wild and Tears of the Kingdom |
| Leftover String References | Zonai civilization and Korok Forest | Confirms the remake was directly branched off the Tears of the Kingdom codebase |
As OatmealDome noted, other Nintendo EPD titles built on ModuleSystem (such as Splatoon 3 or Super Mario Bros. Wonder) do not contain leftover strings or modules from the Zelda team's open-world games. By contrast, Ocarina of Time Remake houses numerous code remnants lifted straight from Tears of the Kingdom. These include underlying modules tied to the Chemistry Engine that governs fire, wind, and electricity interactions, alongside unused text references to the ancient Zonai civilization and Korok Forest.
Why Branching Off Tears of the Kingdom Matters for Switch 2
By branching the project directly off the mature Tears of the Kingdom codebase rather than starting from scratch, Nintendo EPD and the veteran support staff detailed in our report on Monolith Soft's official development role on Zelda Ocarina of Time were able to leverage battle-tested rendering, skeletal animation, and physics pipelines. That shared foundation explains why Link's movement inertia, free-camera responsiveness, and dynamic 60 FPS lighting feel so cohesive on the official Nintendo Legend of Zelda hub.
For players currently scouring Hyrule's dungeons and tracking down arachnid tokens with our Adult's and Giant's Wallet Gold Skulltula upgrade guide, this technical lineage also opens an exciting door for the future: now that all of Ocarina of Time's core mechanics and assets operate natively within the Switch 2 ModuleSystem pipeline, Nintendo already holds the ideal foundation should it choose to remake its direct sequel, Majora's Mask.
My Perspective
Finding out that Zonai references and Tears of the Kingdom's chemistry modules are tucked away inside the code of Ocarina of Time Remake immediately clicks with how the game feels in your hands. From the moment you step out of Link's treehouse in Kokiri Forest, the subtle weight of his footsteps, the foliage physics, and the camera transitions carry the unmistakable DNA of modern 3D Zelda. Repurposing the studio's most advanced open-air engine to rebuild its 1998 masterpiece was a brilliant engineering shortcut by Nintendo EPD.
Based on the outskirts of New York City, Chaya 'Chayane' spent five years studying software engineering in Montreal before returning to her home state. A Full-Stack developer and Deep Learning AI architecture researcher, she explores neural networks and algorithmic optimization while engineering data pipelines for Retrocharting and Gamescharting alongside Grimtag. A gamer for over 20 years and an avid collector of Nintendo history and The Legend of Zelda, she explored World of Warcraft's Azeroth before bringing her deep technical background to video game analysis.
