Sonic Robo Blast (often retroactively abbreviated as SRB1) is a computer fangame based on the Sonic the Hedgehog series. It is a 2D platformer, Developed by Sonic Team Junior.Sonic Robo Blast (often retroactively abbreviated as SRB1) is a computer fangame based on the Sonic the Hedgehog series. It is a 2D platformer, Developed by Sonic Team Junior.Sonic Robo Blast (often retroactively abbreviated as SRB1) is a computer fangame based on the Sonic the Hedgehog series. It is a 2D platformer, Developed by Sonic Team Junior.