Complete Green Hill Zone 1-1 or 1-2 in 29 seconds orless to receive 50,000 bonus points.
Press C-Up, C-Down, C-Left, Right at the title screen. A ringing sound will confirm this portion of the code. Hold A, tap Start, and keep A held until Sonic appears.
You can almost always have the Special Zone entranceopen (the giant ring next to the sign at the end of level Acts1 and 2) by not losing your rings. If you do lose your rings,when you pass a checkpoint, intentionally die, then continue throughthe level without losing any rings. This works about 80% of thetime.
Collect 50 rings and finish the stage. There will be a giant ring.
Collect the extra life at the very bottom of GreenHill Zone - Act 3. Accumulate 100 rings to obtain another extralife. Collect a third extra life located at the top of the loop-the-loop.Intentionally lose a life and repeat the process.