Sega announced that Sonic 1, Sonic 2, Sonic 3 and Knuckles, and Sonic CD will be delisted from digital storefronts in May in the lead up to the remastered Sonic Origins collection.
Classic Sonic Games Being Delisted By Sega
Sonic Games Are Being Delisted Ahead Of Sonic Origins Release - IGN
Classic Sonic Games Being Delisted By Sega
Sega delisting classic Sonic games in May ahead of Sonic Origins, sonic game
The Untold Truth Of Sonic The Hedgehog
Sonic Origins - Wikipedia
Sega is delisting the Sonic games included in the Sonic Origins collection
Sonic the Hedgehog 2 - Wikipedia
Sonic Origins, Sonic Wiki Zone
Sonic Games Are Being Delisted Ahead Of Sonic Origins Release - IGN
Review: Sonic Origins is a tragic example of good classics ruined by greed
Sega delists classic Sonic games ahead of Sonic Origins launch