- The Opening Act
Race through the first stage.
Unlocked offline - 2 guides
- GREEN HILL Restored!
Restore the GREEN HILL Stage Gate.
Unlocked offline - 2 guides
- CHEMICAL PLANT Restored!
Restore the CHEMICAL PLANT Stage Gate.
Unlocked offline - 2 guides
- SKY SANCTUARY Restored!
Restore the SKY SANCTUARY Stage Gate.
Unlocked offline - 2 guides
- SPEED HIGHWAY Restored!
Restore the SPEED HIGHWAY Stage Gate.
Unlocked offline - 2 guides
- CITY ESCAPE Restored!
Restore the CITY ESCAPE Stage Gate.
Unlocked offline - 2 guides
- SEASIDE HILL Restored!
Restore the SEASIDE HILL Stage Gate.
Unlocked offline - 2 guides
- CRISIS CITY Restored!
Restore the CRISIS CITY Stage Gate.
Unlocked offline - 2 guides
- ROOFTOP RUN Restored!
Restore the ROOFTOP RUN Stage Gate.
Unlocked offline - 2 guides
- PLANET WISP Restored!
Restore the PLANET WISP Stage Gate.
Unlocked offline - 2 guides
- Sunny Side Up
Defeat Death Egg Robot.
Unlocked offline - 2 guides
- Perfect Punisher
Defeat Perfect Chaos.
Unlocked offline - 1 guide
- Boom Boom Dragoon
Defeat Egg Dragoon.
Unlocked offline - 1 guide
- Scrap Metal
Defeat Metal Sonic.
Unlocked offline - 2 guides
- Shadow Boxing
Defeat Shadow.
Unlocked offline - 2 guides
- Silver Got Served
Defeat Silver.
Unlocked offline - 2 guides
- Treasure Hunter
Collect all the Chaos Emeralds.
Unlocked offline - 1 guide
- All Stages Cleared!
Clear Sonic Generations.
- Greased Lightning
Clear GREEN HILL Act 1 within one minute.
Unlocked offline - 2 guides
- Bright Star
Get Rank S in an Act.
Unlocked offline - 3 guides
- Shooting Star
Get Rank S in three Acts.
Unlocked offline - 1 guide
- Blazing Meteor
Get Rank S in seven Acts.
Unlocked offline - 2 guides
- Blue Comet
Get Rank S in twelve Acts.
Unlocked offline - 2 guides
- Big Bang
Get Rank S in all Acts.
Unlocked offline - 4 guides
- Trickstar
Pull off a seven or more trick combo or six trick combo ending in a finishing trick.
Unlocked offline - 6 guides
- Eradicator
Defeat 100 enemies.
Unlocked offline - 3 guides
- Ring King
Reach the goal without dropping any of the rings you collected in GREEN HILL Act 1.
Unlocked offline - 3 guides
- Action Hero
Perform all of Sonic's moves in Act 2.
Unlocked offline - 3 guides
- Bonds of Friendship
Complete all Challenge Acts featuring Sonic's friends.
Unlocked offline - 2 guides
- Walkie Talkie
Chat with each of Sonic's friends you have saved.
Unlocked offline - 4 guides
- Jump for Joy!
Find the spring hidden in GREEN HILL Act 1 and reach the goal with a Red Star Ring.
Unlocked offline - 1 guide
- Walk on Air
Clear SKY SANCTUARY Act 1 without falling and losing a life.
Unlocked offline - 2 guides
- The Byway or the Highway
Get the Red Star Ring located on the shortcut route in SPEED HIGHWAY Act 2 and reach the goal.
Unlocked offline - 1 guide
- Demolition Derby
Wreck 30 or more cars in CITY ESCAPE Act 2.
Unlocked offline - 1 guide
- Secret Sleuth
Get the Red Star Ring located in the hidden room in SEASIDE HILL Act 1 and reach the goal.
Unlocked offline - 1 guide
- Look Both Ways
Reach the goal in CRISIS CITY Act 2 without being hit by a tornado-carried cars or rocks.
Unlocked offline - 1 guide
- A Quick Breather
Get the Red Star Ring atop the highest spot in ROOFTOP RUN Act 2 and reach the goal.
Unlocked offline - 2 guides
- Color Power!
Get the Red Star Ring by using an Orange Wisp in PLANET WISP Act 2 and reach the goal.
Unlocked offline - 1 guide
- Supersonic!
Race through a regular stage as Super Sonic.
Unlocked offline - 2 guides
- Mad Skillz
Get all Skills.
Unlocked offline - 2 guides
- (Hedge)Hogging It All Up!
Get all collectibles.
Unlocked offline - 3 guides
- Red Ring Collector
Get all Red Star Rings.
Unlocked offline - 1 guide
- Halfway Point
Clear half the Challenge Acts.
Unlocked offline - 1 guide
- Mission Accomplished!
Clear all the Challenge Acts.
Unlocked offline - 2 guides
- Can't Touch This
Take no damage from the final boss and clear the stage.
29 June 2014 - 2 guides
- Time Attacker
Play Ranking Attack on all stages.
29 June 2014 - 1 guide
- Walk on Water
Clear CHEMICAL PLANT Act 2 without entering the water.
28 June 2014 - 2 guides
- Join the Ranks
Join the rankings.
28 June 2014 - 2 guides
- A 30-Second Test
Participate in a 30 Second Trial.
28 June 2014 - 1 guide