At the title screen, press Up, Down, Left, Right, Y, X to unlock all levels.Special Zone entrance
Collect 50 rings, and finish the stage for there to be a giant ring entrance to the Special Zone.
You can almost always have the Special Zone entrance open (the giant ring next to the sign at the end of level Acts 1 and 2) by not losing your rings. If you do lose your rings, when you pass a checkpoint, intentionally die, then continue through the level without losing any rings. This works about 80% of the time.Infinite lives
Collect the extra life at the very bottom of Green Hill Zone - Act 3. Accumulate 100 rings to obtain another extra life. Collect a third extra life located at the top of the loop-the-loop. Intentionally lose a life, and repeat the process as many times as desired.Bonus points
Successfully complete Green Hill Zone 1-1 or 1-2 in 29 seconds or less to get a 50,000 points bonus.Hidden 10,000 point Sonic Posts locations
Search the indicated locations to find all hidden 10,000 point bonus Sonic Posts. Note: There are no Sonic Posts in any Zone 3.
Green Hill Zone 1: When Sonic passes this zone, make sure he passes over the last tree. A 10,000 point bous is hidden there.
Green Hill Zone 2: When Sonic passes this zone, make sure he passes between the second and third palm tree. A 10,000 point bonus is hidden there.
Marble Zone 1: When you see the "SONIC HAS PASSED ACT 1" message, you should noticed three columns. To the right of the third column, pass over the little area to get the 10,000 point bonus. In order for this to happen, you should use [Jump] as much as possible to get him to reach the point bonus.
Marble Zone 2: When you see the "SONIC HAS PASSED ACT 2" message, pass his body over the right side of the screen to get the 10,000 point bonus. In order for this to happen, you should use [Jump] as much as possible to get him to reach the point bonus.
Spring Yard Zone 1: The 10,000 point bonus is directly above the sign.
Spring Yard Zone 2: The 10,000 point bonus is just above the blue post prior to the sign. It is closest to the left side of the screen.
Labyrinth Zone 1: The 10,000 point bonus is on the ceiling nearest the right side of the screen.
Labyrinth Zone 2: The 10,000 point bonus is on the top right hand corner of the screen.
Star Light Zone 1: The 10,000 point bonus is slightly above the top right hand corner of the screen. When you hit it, you can just barely see the bottom left hand corner of the point when you return to the ground.
Star Light Zone 2: The 10,000 point bonus can be obtained by having Sonic jump on top of the second lamp post that can be viewed from the screen. When you return to the ground, you cannot see the point.
Scrap Brain Zone 1: Under the ground, you will see a series of pipes that seems to go in this pattern: "l n l". The 10,000 point bonus is above the first "l" (pipe). It may be complicated to reach.
Scrap Brain Zone 2: No points in this zone.