This is the alpha test of v.5.0 containing the audio tracks of the CD version and the ISO format of the game This is the v.5.0 alpha test containing the audio tracks of the CD version and the ISO format of the game, compressed rom in ZIP format, you need to extract it and play it on emulator or real hardware : https://archive.org/download/sonic-megamix-5.0/Sonic%20Megamix%205.0.zip