Sonic Robo Blast 2 is a free 3D Sonic the Hedgehog fan-game built on a heavily modified fork of the Doom Legacy source port of Doom. It is closely inspired by the original Sonic games from the Sega Genesis, and attempts to recreate their classic design in 3D with robust multiplayer and mod support.

Visit the Official Sonic Robo Blast 2 Website
(check out the Wiki and Forums too!)

Interested in non-Windows ports?
Check out this section of the SRB2 Website for more information and downloads!

Download today and experience:

  • Old-school Genesis-era platforming complete with rings, springs, baddies, reversible gravity and more!
  • Fast-paced multiplayer action with support for up to 32 players online or 2 player splitscreen across multiple game modes.
  • 3 playable characters - Sonic (Speed), Tails (Flight), and Knuckles (Power) - traversing unique stage paths and carefully balanced for online match play.
  • Deep exploration spanning a variety of locations, from green meadows to deep underwater ruins, mines, mountains, and space stations - or perhaps more...
  • Original soundtrack produced by some of the most renowned Sonic music artists on the internet.
  • Loads of unlocks to keep you busy far past completing the single-player campaign, including hidden levels, game modes, and cheats!
  • Extensive configuration support for modern Keyboard + Mouse controls, or more relaxed gamepad controls, with individual sensitivity sliders.
  • Tons of user-created content - custom characters, levels, mods, and all sorts of other good stuff to extend gameplay well beyond the initial package.
  • Well-supported level design tools (such as Zone Builder) that allow easy creation of your own custom stages. (See SRB2 Wiki: Level Design for more info.)
  • Flexible mod support via Lua scripting or Sonic Object Configuation system - allowing new items, enemies, bosses, scenery effects and (much) more.
  • Full source code for the game available on GitLab and GitHub.
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RSS Articles

Sonic Robo Blast 2 v2.2 has been released! Grab it now from ModDB Downloads or!

From Rob at

Hey all. 5 years. It's been a wild ride for us, but we're finally done. [...] I'm not going to bore you with an incredibly long post, so I'll keep it super brief. I want to give a heartfelt thank you to all of you who stuck with us over the past 5 years, and to all of you who helped contribute along the way. This release is a major milestone for all of us. We've been hyping up that 2.2 is a massive upgrade in virtually all respects, and I hope that you won't be disappointed. On behalf of the development team, enjoy!

Version 2.2

Sonic Robo Blast 2 v2.2 Full


  • Slopes have been implemented into almost the entire campaign, including support for launching off of quarterpipes. No, before you ask, loops still aren't possible.
  • An enormous number of graphics and textures have been updated or redone. Highlights include the title screen, Sonic and Tails, with separate sprites of Tails's tails for optimum mofumofu.
  • Practically the entire soundtrack has been redone.
  • Character sprites now face the direction the player's control inputs point instead of in the direction the camera is facing.
  • Automatic braking, a new assist feature, has been added. While enabled, releasing the controls will cause the player's character to attempt to stop instead of coasting forward.
  • Tails's AI has been significantly improved in Sonic & Tails mode, including allowing him to be commanded to fly you without using player 2's controls.
  • The attraction, elemental, and force shields now have a jump-spin ability like whirlwind and armageddon already did.
  • Continuing the game after getting a game over now starts the player with more lives for each continue used.
  • The intro cutscene has been revamped with brand-new art, and the game now has a short ending sequence.


  • Arid Canyon Zone Acts 2 and 3 now exist.
  • Almost the entire rest of the campaign has been remade from scratch or significantly updated.
  • Several bosses have had their arena and behavior updated.
  • The final battles have been adjusted to make losing not kick the player all the way back to the beginning of Eggrock.
  • A short, optional tutorial stage has been added.
  • Two stages previously from the OLDC have been included as unlockables.
  • Cooperative mode now uses the old 2.0 special stages, which have been slightly updated to be more multiplayer-friendly.


  • The menus have been massively revamped to both look better and be easier to understand.
  • Controls, menus, and various other things have been renamed to make them easier to understand.
  • Record attack now has HUD elements to display the buttons being pressed both during gameplay and while watching replays.
  • Multiple accessibility features have been added, including closed-captioning and the ability to adjust the palette at runtime to add contrast to aid colorblind players.


  • The palette has changed again to provide slightly more diverse color options
  • Music no longer restarts from the beginning after an interruption, such as getting an extra life.
  • Plugging in a controller during gameplay will allow that controller to be used instead of requiring the game to be restarted to recognize it.
  • Added support for paper sprites, which allow the sprite to be rendered as if it's on an upright piece of paper, becoming thinner when viewed at an angle and disappearing entirely when viewed from the side. Think Paper Mario.
  • Textures can now be used as flats (but not vice-versa).
  • Skybox rendering has been significantly optimized.
  • PNG images can now be used as graphics, at any resolution (but not too high or you'll run out of memory).
  • Sprite rotation is now supported.
  • libopenmpt support
  • Added support for the MD3 model format.
  • So many Lua changes we couldn't possibly hope to list them all here.

Finally, as a reminder, the wiki is going to be out of date for a while until people have time to update it, so be aware that editing documentation is going to be sketchy until those updates are made. We recommend playing vanilla while you wait!

Version 2.1 Progress Wiki / See Also: Roly Poly Putt

Version 2.1 Progress Wiki / See Also: Roly Poly Putt


Past SRB2 developers AJ “SSNTails” Freda and Mike “Spazzo” Antonakes have released their first commercial title for iOS: Roly Poly Putt!

Master Server Reform

Master Server Reform


Hot off the press, this news post by Spazzo from details upcoming changes to the Master Server system, making finding the right match easier...

Server Browser Blues?

Server Browser Blues?

News 1 comment

Having trouble finding games online? Server browser list empty? Read here!

New MP Match Snippet Videos

New MP Match Snippet Videos


News post detailing new MP Match "snippet" videos featuring approximately 20-30 seconds of raw gameplay footage. More (and likely longer) videos are planned...

RSS Files
Sonic Robo Blast 2 v2.2 Full

Sonic Robo Blast 2 v2.2 Full

Full Version 1 comment

5 years in the making, Sonic Robo Blast 2 v2.2 is finally released!

Sonic Robo Blast 2 v2.1.14a Full

Sonic Robo Blast 2 v2.1.14a Full

Full Version 5 comments

With further improvements to stability, this is hopefully the most stable 2.1 yet! (... Wait.) It may be installed on its own or on top of an existing...

Sonic Robo Blast 2 v2.1.11 Full

Sonic Robo Blast 2 v2.1.11 Full

Full Version 1 comment

This release introduces additional online stability fixes and various other improvements. It may be installed on its own or on top of an existing SRB2...

Sonic Robo Blast 2 v2.1.10 Patch

Sonic Robo Blast 2 v2.1.10 Patch

Patch 1 comment

Patch addressing Lua issues, general online stability and a few minor issues with OpenGL rendering. This patch is required for online play and requires...

Sonic Robo Blast 2 v2.1.7 Full

Sonic Robo Blast 2 v2.1.7 Full

Full Version

More than 4 years in the making, Sonic Robo Blast 2.1.7 offers a highly refined 3D take on the old-school Genesis-era Sonic experience.

Sonic Robo Blast 2 v2.0.7 Patch

Sonic Robo Blast 2 v2.0.7 Patch

Patch 3 comments

Hotfix patch containing a critical bug fix as well as a few other small improvements. This patch is required for online play.

Comments  (0 - 10 of 39)

I Like it and Question: How i fix Mods?

Reply Good karma Bad karma0 votes

Wow I love this game! I've always loved knuckles and I love the fact that you can glide with him and climb all the walls :) This game is great don't let anyone tell you otherwise ;)

Reply Good karma Bad karma+1 vote

first of all i just want to say this game is amazing, thank you so much
for crafting such an amazing piece of software. however i do have a couple recommendations, first on the list is please tweak some of the gravity and physics sonic is a little slidy for me. secondly is could you adjust the size of the items like springs and ring boxes they're hard to pin point. and lastly could you add a homing attack feature i often find myself drifting around enemies. but aside from these this is probably the best fan made indie game ive ever played id rate it 9/10

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Is one of these a mac version? O:

Reply Good karma Bad karma+2 votes
foxBoxInc Creator

Sorry for the late reply, but please check out the SRB2 Ports thread at

I'll see about getting them possibly listed here.

Reply Good karma+2 votes

Why haven't I seen this before? This is amazing!

Reply Good karma Bad karma+2 votes
foxBoxInc Creator

Glad you like it!

Reply Good karma+2 votes
foxBoxInc Creator

Hey everyone, sorry for the lack of updates and comments. I've gone through and cleaned up the profile - OS listings should be accurate (see, among other things.

Will at some point get recent material posted over here (see in the meantime for some 2.1 tidbits). Remember, SRB2 is free and all parties involved donate their free time towards further development, so patience is appreciated. ;)


Reply Good karma+2 votes

eu não sei qual é o botão de instalar

Reply Good karma Bad karma+2 votes

where the PSP version?

Reply Good karma Bad karma+2 votes
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Sonic Robo Blast 2
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Sonic Team Junior
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Highest Rated (2 agree) 10/10

Amazing classic gameplay the way we all want to play sonic games. the multi-player is OUTSTANDING! The developers worked hard and released a fantastic game! DOWNLOAD IT NOW!!!! SONIC FANS MUST!!!!

Feb 5 2011 by [NEON]


Latest tweets from @sonicteamjr

RT @AliceAlacroix: I've updated and ported Legacy Hinote into SRB2 v2.2! Please take a look at this forum post for more info and how t…

Jan 19 2020

RT @SeventhSentinel: Zone Builder Tutorial - Part 6: Advanced Slopes #srb2

Jan 16 2020

Can you really say your game is good if no one tries to make Desert Bus in it?

Jan 15 2020

Is your child texting about #SRB2 modding? LOL: Lots Of Linedefs BRB: Blockmap Really Broken SMH: SOC Map Header T…

Jan 13 2020

RT @SeventhSentinel: Zone Builder Tutorial - Part 5: Level Headers #srb2

Jan 11 2020

RT @SeventhSentinel: Zone Builder Tutorial - Part 4: Character Path Splits #srb2

Jan 10 2020

RT @SeventhSentinel: Zone Builder Tutorial - Part 3: Floor/Ceiling Movement #srb2

Jan 9 2020

RT @SeventhSentinel: 2x combo! Zone Builder Tutorial - Part 2: Water, Slopes, Singleplayer Essentials, and More #srb2

Jan 9 2020

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