Sonic Robo Blast 2 (3D Sonic fangame in development for 20+ years

Woolie also talked about the game on his podcast.

Sonic Robo Blast 2/Archived Versions/Final Demos - The Cutting Room Floor

Cube Tries to Play (Almost) Every Sonic Game - Page 3 - General Gaming Discussion - N-Europe Forums

Alex plays (almost) every Sonic the Hedgehog game - #4: Sonic the Hedgehog 2 (SEGA Master System, 1992) - General Gaming - Serenes Forest Forums

The Classic Sonic Trilogy recreated in Sonic Robo Blast 2

The Classic Sonic Trilogy recreated in Sonic Robo Blast 2

Adding 3D Models To SRB2: A Guide To Customizing Your Gaming Experience

Sonic Robo Blast 2, but the gravity changes every 10 seconds.

Fan game Sonic Robo Blast 2 gets a new tutorial, various improvements

Sonic Robo Blast 2 (3D Sonic fangame in development for 20+ years) releases huge new update