On this episode of DF Retro, John explores Sonic CD and all its ports. With a focus more on exploration rather than speed and a bright presentation, Sonic CD remains one of the most unique games in the series. Curious about how it uses the Mega CD hardware? Or how about the three separate versions of Sonic CD for Windows? It's all here! Subscribe for more Digital Foundry: http://bit.ly/DFSubscribe Support the Digital Foundry Patreon for more work like this, and high quality video downloads: https://www.digitalfoundry.net/