Fan Project Runs Smash Bros. Ultimate Natively on Windows
OpenSmash-Ultimate began accepting playtesters on October 19, 2026, using static recompilation of the Switch game's AArch64 code.
OpenSmash-Ultimate, an unofficial open-source project, began accepting playtesters on October 19, 2026, letting players run Super Smash Bros. Ultimate natively on Windows, according to GameRant. The project distributes no game files and requires users to supply their own copy of the Nintendo fighting game.
The port works through static recompilation: it translates the game's AArch64 machine code into C and compiles it for Windows x64, supporting Super Smash Bros. Ultimate versions 13.0.4 and 13.0.5. Rather than relying on a CPU interpreter or a just-in-time compiler, it recreates Switch services and translates Nintendo's NVN graphics API to Vulkan.
The developer reports that full matches have run at 60 FPS, with controller remapping, resolution scaling, VSync settings, local saves and experimental online play supported.
The developer also said AI coding agents wrote almost all of the project's code under their direction.
An older game still in circulation
Super Smash Bros. Ultimate was released on December 7, 2018, and had sold 38.14 million copies as of June 30, 2026. It remains playable on the Switch 2 through backward compatibility and received an official update in September 2026.
Quick answers
What is OpenSmash-Ultimate?
It is an unofficial open-source project that runs Super Smash Bros. Ultimate natively on Windows using static recompilation.
Do I need to own the game to play it?
Yes. The project distributes no game files, assets, keys or firmware, so users must supply their own copy of Super Smash Bros. Ultimate.
Which game versions are supported?
The project supports Super Smash Bros. Ultimate versions 13.0.4 and 13.0.5.