Race through the first stage.
Continue playing to unlock this secret achievement.
Pull off a seven or more trick combo or six trick combo ending in a finishing trick.
Perform all of Sonic's moves in Act 2.
Defeat 100 enemies.
Get Rank S in an Act.
Reach the goal without dropping any of the rings you collected in GREEN HILL Act 1.
Clear Sonic Generations.
Clear GREEN HILL Act 1 within one minute.
Get Rank S in three Acts.
Get Rank S in seven Acts.
Get Rank S in twelve Acts.
Get Rank S in all Acts.
Complete all Challenge Acts featuring Sonic's friends.
Chat with each of Sonic's friends you have saved.
Join the rankings.
Participate in a 30 Second Trial.
Get all Skills.
Get all collectibles.
Play Ranking Attack on all stages.
Get all Red Star Rings.
Clear half the Challenge Acts.
Clear all the Challenge Acts.
