Collect 50 Rings in a single Act.

Earn an extra life.

Clear Under Ground Zone.

Clear Sky High Zone.

Clear Aqua Lake Zone.

Clear Green Hills Zone.

Clear Gimmick Mountain Zone.

Clear Scrambled Egg Zone and watch the credits... but wait, did you forget something?

Find a Chaos Emerald!

Obtain a full collection of 6 Chaos Emeralds!

Watch the stars together with your dearest friend.

Collect 15 lives.

That 1-Up box in Sky High Zone's hidden grove deserves a closer inspection...

Find the 1-Up monitor hidden in Under Ground Zone Act 1.

Complete Sky High Zone Act 2 without falling below the thunderhead.

Find the hidden 1-Up at the end of Aqua Lake Act 1.

Navigate Aqua Lake Act 2 without letting your air levels get critically low. (Do not let the countdown appear)

Finish Green Hills Zone Act 1 in 50 seconds or less.

Finish Green Hills Zone Act 2 in 50 seconds or less.

In Green Hills Zone Act 3, reach the boss in 30 seconds or less.

Spin Tails' face on the Goal Plate and earn a Continue! (See comments)

Earn 100,000 points.

Earn 200,000 points.

Earn 300,000 points.

Clear Under Ground Zone's boss act without losing a life.

Clear Sky High Zone's boss act without losing a life.

Clear Aqua Lake Zone's boss act without losing a life.

Clear Green Hills Zone's boss act without losing a life.

Clear Gimmick Mountain Zone's boss act without losing a life.

Clear Scrambled Egg Zone's boss act without losing a life.

Clear the game without using any Continues. (Can get either ending)