NDS Cheats - Sonic Classic Collection Guide - IGN

Sonic Mania, A Gamer's Cheat Codes Wiki

Sonic Mania review - Polygon

Sonic Origins: How To Access Level Select

Sonic Origins: Cheat Codes

Sonic Frontiers, Cheats & Cheat Codes for Xbox One, PlayStation 5, Windows, and More - Cheat Code Central

Multiple Cheat Codes For Sonic Mania Have Been Discovered

Tails' Channel, celebrating 15 years on X: A number of Sonic 3 & Knuckles soundtest features were added in the latest update. @TheOcelot01 recapped all the codes in the list below. #SonicNews

Sonic Mania Cheat Codes Discovered - Infinite Continues, All Chaos Emeralds, More

Sonic Origins Blue Spheres codes, Use level passwords to jump forward

Sonic Origins 1.04 (Switch's 1.4.0) update released, addresses almost 50 bugs.