A Gamer's Cheat Codes Wiki
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Sonic the Hedgehog 3 & Knuckles (also known as Sonic 3 & Knuckles) is the 1994 platformer you can play by locking Sonic the Hedgehog 3 onto Sonic & Knuckles via Lock-On Technology. It's a combination of both games, containing all the Zones from both titles, all three characters, and even some brand new content repurposing other content. Certain liberties aside, this Lock-On title is what the developers intended Sonic the Hedgehog 3 to become, but time constraints resulted in the two games being separated.

The game has been re-released through multiple compilations as its own game, including Sonic Mega Collection, Sonic Classic Collection, and released as a standalone title through Valve's Steam PC service.

In Sonic Mega Collection, it can be unlocked by playing Sonic the Hedgehog 3 and Sonic & Knuckles 30 times.

Cheat Codes[]

All of the codes provided relate to the original Mega Drive and Genesis releases of Knuckles in Sonic 2. Later re-releases or remakes may not have these cheat codes, or the codes may have changed.

Zone Select In Angel Island Zone, while hanging off one of the swinging ropes, press Left, Left, Left, Right, Right, Right, Up, Up, Up. You should hear a ring chime. Pause and press A to be taken back to the title screen. A Sound Test option should be under the Competition option if you scroll down.
SK level select
Debug Mode After you've activated the Zone Select, go to Mushroom Hill Zone. While hanging off one of the pulling machines, press Left, Left, Left, Right, Right, Right, Up, Up, Up. You should hear a ring chime. Pause and press A to be taken back to the title screen. Go back to Sound Test. When selecting a level, keep holding A until the level loads.
S&K DebugMode
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