Sonic 4 in 1 is a compilation of Sonic 1, Sonic 2, Sonic 3, Sonic & Knuckles, and in addition allows you to also play Sonic 3 & Knuckles, Sonic 2 & Knuckles and the Blue Spheres minigame. The original idea for this came from Vladikcomper's Sonic 3 in 1. Since that hack only opted to include Sonic 1 to Sonic 3 due to limitations, I thought to make one better and prove all 4 games.
Credits:
Natsumi - Menu program, skeleton, game fixes, variable width font, custom Sonic Retro scripts & compatability
Flamewing - gen\_scalers (horizontal software scaler program)
GF ThePlayer - Main artist
VAdaPEGA - Art help (Sonic 1, Sonic 2)
ValleyBell - Sound driver help
Vladikcomper - Music, SSRG splash screen
Marc - Music, Sonic Retro splash screen
MarkeyJester - Animation
djohe - Testing
RedHotSonic - Testing
