Nextendo Ryujinx Fork Brings Private Online to Three Switch Games [2026]

    Tuesday, September 22, 2026

    By Indie Kings | September 22, 2026

    Updated September 22, 2026: Nextendo is a Ryujinx fork with built-in private online play for Mario Kart 8 Deluxe, Splatoon 2 and Smash Ultimate, per the official repository README. The emulation core is unchanged from upstream with 231 stars and 27 forks, and unconfigured builds run as plain offline Ryujinx.

    Based on Ryujinx project badge

    Image: Upstream basis badge. Credit: NextendoNetwork via GitHub.

    What Nextendo is

    Per the README, Nextendo forks the open-source Ryujinx Switch emulator from the Ryubing community continuation of gdkchan is project. Additions stay in the networking layer plus user experience with CPU, GPU, audio, input and filesystem cores unchanged, per the same file.

    Per the README, 62 commits sit on main with 13 issues plus 8 pull requests open. Small young project, so expect movement on titles and bugs.

    Per the README, with no server configured the build behaves like stock offline Ryujinx. Nothing phones home by default since addresses fall back to loopback.

    Online titles and how it works

    Per the README table, Mario Kart 8 Deluxe runs worldwide races plus lobbies, Splatoon 2 runs Turf War plus private battles plus Salmon Run plus Splatfests, and Smash Ultimate runs online arenas. More titles are marked in work.

    Per the README, the emulator transparently redirects game hostnames via a built-in DNS-MITM resolver with hosts-file entries taking precedence for custom servers. Account tokens get locally signed for titles that verify them, with the signing key supplied at runtime and never bundled, per the same file.

    Per the README, peer-to-peer hole-punching is kept alive across NAT bring-up, with a first-run wizard, online status, in-game friends and a kill-switch rounding it out. No server addresses are hardcoded in the repo.

    Title per READMEStatusModes
    Mario Kart 8 DeluxePlayableWorldwide races, lobbies
    Splatoon 2PlayableTurf, private, Salmon, fests
    Smash UltimatePlayableOnline arenas

    Setup and requirements

    Per the README, three environment variables point a build at a server: NEXTENDO_SERVER_IP for main hostnames, NEXTENDO_NAT_IP for the NAT probe responder, and NEXTENDO_BAAS_SIGNING_KEY as PEM or a nextendo_baas.pem file beside the executable. Unset means loopback and dormant online, per the fallbacks.

    Per the README, comfortable PCs need 8 GiB RAM, 6 CPU cores, a GPU from the last 10 years with OpenGL 4.6 or Vulkan 1.4, plus Windows 10 20H1, modern Linux, or Apple Silicon macOS Big Sur and up. Builds run dotnet build on src slash Ryujinx csproj Release, per the compiling notes.

    Pair with our Switch coverage for context, but this is a separate community project from any prior emulator drafts.

    Variable per READMEPurposeFallback
    NEXTENDO_SERVER_IPMain hostnames target127.0.0.1
    NEXTENDO_NAT_IPNAT probe responder127.0.0.1
    NEXTENDO_BAAS_SIGNING_KEYAccount token signingThrowaway key
    • Offline: Leave vars unset for stock behavior.
    • Custom: Hosts entries beat built-ins without rebuilds.
    • Build: .NET SDK per global.json, see COMPILING.md.

    Per the README, the project is independent and non-commercial with no Nintendo affiliation, shipping no Nintendo code, keys or assets. Players must supply legally dumped games plus system files exactly as upstream requires.

    Per the README, Nextendo is own code sits under PolyForm Shield 1.0.0, which allows reading, use, modification and self-hosting but blocks competing use. Upstream MIT license plus libvpx BSD plus ffmpeg LGPLv3 notices are retained, per the file.

    Online play runs on community servers, not Nintendo is network. Keep official accounts and modded play separated as a rule.

    FAQ

    What is Nextendo?
    Per the README, a Ryujinx fork adding a built-in private-online client with unchanged emulation cores.

    Which games work online?
    Per the README table, MK8D, Splatoon 2 and Smash Ultimate with more in work.

    Do I need my own dumps?
    Yes, per the README. No Nintendo code, keys or assets ship with it.

    What are the PC needs?
    Per the README, 8GB RAM, 6 cores, decade-era GPU with GL 4.6 or Vulkan 1.4.

    What is the license?
    Per the README, PolyForm Shield for new code with upstream MIT retained.

    Is this official Nintendo online?
    No. Community-run servers via hostname redirection, per the README.

    Bottom Line

    Stock Ryujinx accuracy with plug-and-play community online for three flagship titles. Bring legal dumps, set three variables, and race.

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