These codes are for the European version of the game.
- Sonic 2 Codes
Master Code – Must Be On
G106-2WH8-83R0C
19PQ-PX5C-2GP90
Infinite Rings
WFV4-95VD-KNZZP
53GZ-U023-XFJTU
E546-RT1F-428TR
Hold L to get past Results screen
Infinite Lives
XYQ9-R1C0-27BEB
40BR-4VN0-ZPW8F
Low Time
GJAE-VQZ9-C07RY
53GZ-U023-XFJTU
BYUY-QYFQ-K5P6J
Hold L to get past Results screen
Invincible
24KB-JYCZ-6GM96
WD3Q-3RG7-8G3MR
Press A for Super Jump
UN66-571F-N3MJZ
BP8V-AAH0-M5F76
AFQZ-WBKM-13FZM