Sonic Robo Blast 2

Sonic Robo Blast 2 is a fan-made 3D Sonic platformer built around the classic speed, jumping and exploration associated with the famous blue hedgehog. Although the game uses a three-dimensional engine, its gameplay retains the feel of traditional Sonic adventures, with colorful levels, enemies, rings, ramps and plenty of opportunities to move at ridiculous speed. Multiple characters and game modes add variety, while the extensive fan community has created additional content and modifications over the years. The result is much more than a simple technical experiment; it feels like a complete fan interpretation of Sonic's classic formula. Sonic Robo Blast 2 is particularly appealing to players who enjoy old-school platforming and community-made projects, especially when 'going fast' is considered a perfectly reasonable substitute for careful planning.

“Sonic Robo Blast 2 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.” - SBB2 team