Sonic Roboblast 2 3DS

From GameBrew

Sonic Roboblast 2
Last Updated2019/01/23
[v1.1.3+gamefiles Download]

Sonic Roboblast 2 3DS is a port of Sonic Robo Blast 2 to the Nintendo New3DS/2DS consoles.

It is a 3D open-source Sonic the Hedgehog fangame built using a modified version of the Doom Legacy port of Doom. SRB2 is closely inspired by the original Sonic games from the Sega Genesis, and attempts to recreate the design in 3D.


Available in 3DSX and CIA formats:

  • If you would like to use the .3dsx file, copy it to /3ds/srb2_3ds/ on your SD card.
  • If you would like to use the .CIA file, you may copy it at any location on your SD card.

Extract the gamefiles to /3ds/srb2_3ds/ on your SD card.

You may also copy the gamefiles to the root directory (note: make sure any existing config.cfg file is located in the same directory as the game files).

Note: Make sure you have dumped your DSP firmware and dspfirm.cdc is present. If it isn't, install and run the DSP dumper first.


srb23ds3.png srb23ds4.png


Sonic Robo Blast 2 Homebrew for New Nintendo 3DS [Deutsch|HD] (Flashcardsinfo)

Sonic Robo Blast v2.2 - Story Playthrough (Sonic Overtime)


For N3DS only.

Tested on Citra.

Known issues

Does not run on o3DS devices. The Nintendo New3DS' HW allows higher CPU clock frequencies and adds another layer of cache. On o3DS it's extremely laggy and would probably require modifications to the level design in order to run it at a decent FPS.

No support for MIDI music and netplay.

Lower screen isn't really used.

CEZ2 is extremely laggy.



  • HUGE performance increase thanks to mipmapping.
  • Stereoscopic 3D rendering.
  • Initial CIA support.
  • Fixed graphics glitch that was caused by uninitialized GPU shadow state registers.
  • Fixed fog color.
  • Fixed hole in GFZ2.
  • Fixed crash when DSP firmware is missing.
  • ...other miscellaneous fixes.

v1.0 beta

  • Initial release.


Thanks to fincs, WinterMute, Monster Iestyn, Sryder, AlamTaz, Steel Titanium for help with development.

Thanks to profi200, fincs and WinterMute for testing.

Credit for 3DS homebrew logo goes to PabloMK7.

External links