Mushroom Hill Zone from Sonic & Knuckles recreated in widescreen 3D. This is just a video, and not a playable game. It was animated over an actual gameplay video of S&K that I recorded. It was designed as a graphical demo to see how well classic Sonic gameplay and level design would adapt to 2.5D.
This was made over the course of about 2-3 weeks from scratch inbetween other work (excluding render times, which were fairly short anyway).
Created with 3DS Max and composited in Adobe After Effects.