Omori was developed in RPG Maker MV. While older RPG Maker games (like Yume Nikki or Ib ) can often be ported to the 3DS via custom tools, RPG Maker MV exports to JavaScript/HTML5. The 3DS hardware (released in 2011) simply does not have the native power or architecture to run MV games smoothly without significant optimization.
However, if you have a hacked 3DS, keep an eye on and the Omori subreddit . If a working port ever surfaces, those communities will announce it first. Until then, enjoy Earthbound or Mother 3 on your 3DS—they were Omori’s biggest inspirations anyway. Omori 3ds Cia
To run any "unofficial" content, a 3DS must be modded with tools like Luma3DS . Omori was developed in RPG Maker MV
While technically possible in principle to adapt a PC indie RPG like Omori into a 3DS CIA package, doing so requires extensive porting work and—crucially—permission from the copyright holders. Unofficial CIAs are typically illegal and risky; prefer official releases or seek lawful alternatives. However, if you have a hacked 3DS, keep
Save often. I experienced 3 hard crashes in 15 hours, mostly during transitions (real world ↔ Headspace) and in Black Space 2. One soft-lock required a hard reset.