Sonic & Knuckles Collection

Sonic & Knuckles Collection is a Sonic the Hedgehog compilation game for Microsoft Windows-based PCs.

The ports have all of the music emulated in MIDI format. Some music (that of Carnival Night Zone, Ice Cap Zone, Launch Base Zone, Knuckles' theme, and the credits music.) was replaced with original music. One possible explanation for this is that those pieces of music used both MIDI and Wave output, and some sound cards of the time were not capable of doing so. Another explanation for the replacement is that the songs were replaced due to legal reasons, because connections could be made between similar songs by Michael Jackson. [1] Other than that, the gameplay is identical to their Genesis counterparts.

The collection includes:

• Sonic the Hedgehog 3
• Sonic & Knuckles
• Sonic 3 & Knuckles
• Blue Sphere (in options dialog as "Special Stage Mode")

Sonic Compilation

Sonic Compilation is a game compilation released in 1995 for the Sega Mega Drive containing three previously released Sonic titles: Sonic the Hedgehog, Sonic the Hedgehog 2, and Dr. Robotnik's Mean Bean Machine. The 1997 released North American Genesis version was renamed to Sonic Classics 3 in 1.

Sonic Compilation was the first collection of multiple Sonic games on one cartridge. In some locations, it even was bundled with the console during its later years.