Sonic Robo Blast 2 Kart Switch

Sonic Robo Blast 2 Kart
General
Author	heyjoeway, Craftyawesome
Type	Racing
Version	1.6 r8
License	GPL-2.0
Last Updated	2025/11/16
Links
Download
Website
Source

SRB2Kart is a kart racing mod based on the 3D Sonic the Hedgehog fangame Sonic Robo Blast 2, based on a modified version of Doom Legacy.

SRB2Kart is a project created by the Kart Krew, it features dozens of tracks across racing and battle modes, some fun power-ups and a drifting system. It also has a neat little in-game manual that explains most of its tricks and secrets.

Features

• Full online support.
• Full mouse/keyboard support.
• Full software keyboard support.

Installation

Make sure your Switch can run homebrew.

To install:

• Extract the contents of the zip to the root of your SD card.
• Then start SRB2 via hbmenu (or whatever method you prefer).
• If you are updating from an older version, extract the contents of the update patch to the root of your SD card. Overwrite any files that might conflict.

Note: This game requires full RAM access. This means youcannot launch hbmenu from the Album Applet when running this. With the latest Atmosphere build and its default config, you can hold R while starting any game to open hbmenu with full RAM access.

User guide

Notes

• The game takes a bit to boot. A faster SD card or higher CPU clock may help with this.
• OpenGL is used by default on this port. To switch to software select "Toggle Renderer" in the video options. Alternatively, delete renderer.txt or write software in that file.
• Automatic resolution runs at 720p on handheld and 1080p docked (OpenGL only). For software 800x450 is recommended.
• The game is CPU bottlenecked even on OpenGL. Models are an additional small performance loss.
• The game continues to run while on the Switch's home screen when you are unable to pause to prevent lag-switching.
• If you want to play the game with mouse/keyboard, you'll have to bind most of the buttons yourself.
• All button bindings are set to match the Xbox controller layout (Xbox A -> Switch B, Xbox X -> Switch Y, etc.)

Screenshots

Media

SRB2Kart v1.0 Trailer (Kart Krew)

Nintendo Switch Online Strikes Again... | SRB2 Kart (Sanok Maynik)

Changelog

v1.6 r8

• Recompile for Atmosphere 1.10
• Only NRO download is required if you installed a previous 1.6 version.

v1.6 r7

• Add an option to toggle renderer (requires restarting the game).
• Reduce Z-fighting in OpenGL.
• Fix saved resolution being ignored with auto resolution off.
• Improve menus related to auto resolution.

v1.6 r6

• Make enabling auto resolution immediately trigger update.
• Fix log sometimes being incomplete on exit/crash.

v1.6 r5

• Update to latest master branch (net compatible). This may fix some minor issues.
• Slight performance improvement.
• Improve perf when log is being spammed, such as loading some addons.
• Slightly speedup filesearch.

v1.6 r4

• Speedup boot.
• Significantly speedup addon search and verification speed.
• Make automatic resolution trigger on startup if enabled.

v1.6 r3

• This adds an auto resolution option which switches between 1080p and 720p if the switch is docked. (Only affects OpenGL)
• Previous release notes:
  • This release supports OpenGL. To use it keep the renderer.txt file in the directory. To switch to software either delete that file or write software in that file.
  • Known issue: Mipmaps do not work due to missing GLU.
  • Do not copy a 1.3 config file, or you will likely need to reset your controller config.
• For the full notes on 1.6 read here: https://github.com/STJr/Kart-Public/releases/tag/v1.6

v1.6 r2 (by Craftyawesome)

• This fixes a crashing issue in many tracks.
• Previous release notes:
  • This release supports OpenGL. To use it keep the renderer.txt file in the directory. To switch to software either delete that file or write software in that file.
  • Known issue: Mipmaps do not work due to missing GLU
  • Do not copy a 1.3 config file, or you will likely need to reset your controller config.
• For the full notes on 1.6 read here: https://github.com/STJr/Kart-Public/releases/tag/v1.6

v1.3 - heyjoeway

• No Switch-specific changes. Unlike previously, this build does feature support for HTTP downloads.
• For the full notes on 1.3 read here: https://github.com/STJr/Kart-Public/releases/tag/v1.3

v1.2

• Just updating Kart to 1.2. No Switch-specific changes. However, this build does not feature the new support for HTTP downloads at the moment. You'll still have to download your add-ons the old-fashioned way.
• For the full notes on 1.2 read here: https://github.com/STJr/Kart-Public/releases/tag/v1.2

v1.1

• This will likely be the final release in the 1.x line for SRB2Kart. I'm moving to GitHub for releases and changelogs to make things a bit tidier.
• This build has been recompiled to better work with Horizon 9.x.x. If you're having issues with input and downloaded Kart a while back, re-download the patch for this release.
• The changelog archive below will not be included in future releases.

v1.0.4.1

• Replaced synchronous software keyboard with inline keyboard. Basically, keyboard now works while online.
• Added online chat support for software keyboard.

v1.0.4

• Updated Kart to v1.0.4. No Switch-specific changes.

v1.0.3.1

• Fixed add-ons menu.
• Added online support.
• Added mouse/keyboard support.
• Added software keyboard support.
• Tweaked default controls.
• Fixed multiplayer menu crash.

v1.0.3 (by heyjoeway)

• Initial release.

Credits

Big thanks to carstene1ns for his work on the initial port; I really only did some polishing work to get this up and running.

Disclaimer:

• Sonic Team Junior is in no way affiliated with SEGA or Sonic Team. We do not claim ownership of any of SEGA's intellectual property used in SRB2.
• The author (heyjoeway), STJr, or the SRB2MB are in no way responsible if this port somehow manages to break your Switch.

External links

• GBAtemp - https://gbatemp.net/threads/sonic-robo-blast-2-kart-for-switch-now-updated-with-opengl.656701/
• Github - https://github.com/Craftyawesome/Kart-Public
• GitHub - https://github.com/heyjoeway/Kart-Public
• SRB2 Message Board - https://mb.srb2.org/threads/srb2-kart-switch-port.26271/