Sonic Robo Blast 2, abbreviated as SRB2, is a computer fangame based on the Sonic the Hedgehog series. It is a 3D platformer developed by a group called Sonic Team Junior, using a modified version of the Doom Legacy source port of Doom. It is closely inspired by the original 2D Sonic games for the Sega Genesis and attempts to recreate this style in 3D. Entirely original to SRB2 is its multiplayer mode, a variation on classic first-person shooter ga