Sonic Robo Blast 2 (SRB2) 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. While SRB2 isn’t fully completed, it already features tons of levels, enemies, speed, and quite a lot of the fun that the original Sonic games provided.
This is free and open source software.
Features include:
- Single player campaign currently featuring 6 full-length zones and one incomplete one-act zone.
- Several multiplayer modes that can be played either via splitscreen or over a network connection. The multiplayer modes include Coop (which is basically the Single Player campaign with multiple players allowed), Competition, Race, Match and Team Match, Capture the Flag, Tag and Hide & Seek.
- Three characters to play as, each with their unique abilities:
- Donic is equipped with the “speed thok”, which makes him shoot forward in the air at a rapid speed. Sonic can also transform into Super Sonic in the Single Player campaign by collecting the seven Chaos Emeralds.
- Tails has a flying ability, allowing him to skip difficult sections and reach almost any place in a level.
- Knuckles has a lower jump height, but is able to climb on walls and glide through the air. Additionally, he can break bustable walls on contact, which occasionally allows him to access exclusive paths.
- All three characters have the spindash ability that is characteristic for Sonic games. There is also an option to play as Sonic and Tails together, where Sonic has Tails by his side to pick him up and fly to higher places.
- Unlockable content – variety of additional content, most notably extra levels. Among these are several exceptionally difficult “challenge stages”, as well as a few community-created levels. Unlockable content can be accessed from the Extras menu on the title screen, which appears after the player first unlocks something. It includes a list of unlockable rewards and the requirements to unlock them. Bonus content can be unlocked primarily in two ways: by hunting for emblems or by acquiring the seven Chaos Emeralds.
- Highly customizable – custom objects, characters and entire levels can be created with the help of external editor. Custom levels can be created with the use of special map editors.
Website: www.srb2.org
Support: GitLab Code Repository
Developer: Sonic Team Junior
License: GNU General Public License v2.0

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