Sonic Origins got help from the Sonic Mania team

The Sonic Origins developer is actually the Sonic Mania team at Headcannon, at least partly - even as fans continue to complain about the strange pre-order DLC

Sonic Mania review

Sonic Origins Co-Dev Is Very Unhappy With The State Of The Game

Sonic Mania: How it Became the Ultimate Sonic Experience

Sonic Origins overview trailer - Gematsu

Sonic Mania Dev on Origins of Easter Eggs, Sega References

Sonic Superstars Review (Switch) - Fast, Fun, and Focused Platforming — Too Much Gaming

Confirmed: Sonic Origins is out in June with new areas, mission mode and more

SEGA Commits to Fixing Sonic Origins Amid Ongoing Criticism

Vincent Mahoney's Save State: Going Hog Wild with Sonic the Hedgehog Series

Sonic Origins modder cancels project, slams 'absolute shit' release