You can find the full list in Sega's FAQ. Sega has not offered a reason for the ... A few years ago, it started delisting classic Sonic games—including those in the Mega Drive/Genesis Classics collection—only for them to be repackaged in Sonic Origins.

A bunch of classic Sega titles will leave Steam, PlayStation, Xbox, and Switch in early December, but not if you already own them.

Sega is delisting over 60 games across console and PC digital storefronts next month. The company reassured players that those who already owned the retro games will still be able to download and play them after they’ve been delisted,