Sonic Robo Blast 2 is a 3D open-source Sonic the Hedgehog fan game built using a modified version of the Doom Legacy port of 1993's 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. While the old Web Demo is no longer supported, you can still download the latest version using one of the links below.