Sonic and Knuckles Collection Cheats

Activate the ''Level Select Cheat''. Once you visit the sound test screen, head to the Special Stage 2. Complete the level by collecting all the blue spheres (It's quite easy). Once the game is completed, you will enter Angel Island Zone. Reset the game by pressing Alt + R. Press up at the title screen to enter the Sound Test area once more. Play the special stage 2 again. Repeat this for 7 times. If done correctly, you should get a message saying ''Sonic can now become Hyper Sonic!''
To become Hyper Sonic, collect 50 rings, and jump twice.