This disc seems to be based more on Sonic & Knuckles than Sonic 3 (If it contains any Sonic 3 at all!) Could it be a reference to the early version of Sonic 3 being so huge they had to split it into 2 games, and ended up "Locking on" S&K?
Either way, the classic Sonic & Knuckles symbol makes a stylish front and unusually colored stock arts adorn the back over a CG 3D ball effect.

Total Play Time (46:10)
1) Theme of "Sonic & Knuckles" 1:15
2) Mushroom Hill 3:03
3) Flying Battery 2:55
4) The Boss 4:28
5) Sandopolis 2:57
6) Lava Reef 3:16
7) Rings and Diamonds Land 4:46
8) Sky Sanctuary 2:50
9) Deathegg 3:01
10) Boss the Boss 4:17
11) "Sonic & Knuckles" Re-Mix 11:46
12) Theme of "Knuckles"