Get Rank S in three Acts.
Continue playing to unlock this secret achievement.
Defeat 100 enemies.
Get Rank S in an Act.
Race through the first stage.
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.
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 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.
