Over 20 minutes on Sonic Generations Development

https://www.youtube.com/watch?v=MQdN3_YdM1A

Why Super Sonic can't use insta-shield in Sonic 3 https://www.youtube.com/watch?v=ywsg2fyhQnM

High Level Overview of Classic Sonic Physics https://www.youtube.com/watch?v=SUmqMixephg

Majin Sonic Boss From Sonic FGX Ultimate

New info on Tails' Creation!!!!!!! https://youtu.be/nHuDtRK4JoU

Super Eggman

Fun & Insightful Tweets from Naoto Ohshima, Sonic's creator. https://youtu.be/fpfrfcIqx1A

A bit on Sonic Rush's Development https://youtu.be/xVS3g3JjJeQ

Some Screenshots of Sonic Ultra by Team Ultra! Download and Play today: https://gamejolt.com/games/sonicultra/882189

I may have gone too far in this one... https://www.youtube.com/watch?v=S3aPiTEMxOA