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18 of 49 (37%) achievements earned:
Personal Achievements
 

The Opening Act

Completed the first stage.
Unlocked 25 Nov, 2012 @ 4:28pm

GREEN HILL Restored!

Restored the GREEH HILL stage Gate.
Unlocked 25 Nov, 2012 @ 4:34pm

CHEMICAL PLANT Restored!

Restored the CHEMICAL PLANT Stage Gate.
Unlocked 25 Nov, 2012 @ 4:48pm

SKY SANCTUARY Restored!

Restored the SKY SANCTUARY Stage Gate.
Unlocked 25 Nov, 2012 @ 6:17pm

SPEED HIGHWAY Restored!

Restored the SPEED HIGHWAY Stage Gate.
Unlocked 28 Nov, 2012 @ 10:59pm

CITY ESCAPE Restored!

Restored the CITY ESCAPE Stage Gate.
Unlocked 28 Nov, 2012 @ 11:10pm

SEASIDE HILL Restored!

Restored the SEASIDE HILL Stage Gate.
Unlocked 29 Nov, 2012 @ 8:43pm

CRISIS CITY Restored!

Restored the CRISIS CITY Stage Gate.
Unlocked 16 Dec @ 6:17pm

Sunny side up

Defeated Death Egg Robot.
Unlocked 28 Nov, 2012 @ 10:44pm

Perfect Punisher

Defeated Perfect Chaos.
Unlocked 15 Dec @ 3:47pm

Scrap Metal

Defeated Metal Sonic.
Unlocked 27 Nov, 2012 @ 10:40pm

Shadow Boxing

Defeated Shadow.
Unlocked 29 Nov, 2012 @ 8:52pm

Bright Star

Got Rank S in an act.
Unlocked 25 Nov, 2012 @ 4:31pm

Shooting Star

Got Rank S in acts three times.
Unlocked 28 Nov, 2012 @ 11:04pm

Trickstar

Executed a trick with a seven-step combo or longer.
Unlocked 25 Nov, 2012 @ 4:31pm

Eradicator

Defeated 100 enemies.
Unlocked 25 Nov, 2012 @ 6:09pm

Demolition Derby

Wrecked 30 or more cars in CITY ESCAPE.
Unlocked 21 Dec @ 4:05pm

Look Both Ways

Reached the goal in CRISIS CITY without being hit by a tornado-carried car.
Unlocked 15 Dec @ 3:47pm



All Stages Clear!

Cleared Sonic Generations.

Greased Lightning

Cleared Green Hill within one minute.

Blazing Meteor

Got Rank S in acts seven times.

Blue Comet

Got Rank S in acts 12 times.

Big Bang

Got Rank S in all acts.

Ring King

Reached the goal without dropping any of the rings you collected in GREEN HILL Act 1.

Action Hero

Performed all of Sonic's actions in Act 2.

Can't Touch This

Took no damage while defeating the final boss.

Bonds of Friendship

Completed all of Sonic's friends' Challenges.

Walkie Talkie

Chatted with all of Sonic's friends you saved.

Join the Ranks

Joined the rankings.

A 30-Second Test

Participated in a 30 Second Trial.

Jump for Joy!

Found the spring hidden in GREEN HILL Act 1 and reached the goal with a Red Star Ring.

Walk on Water

Cleared CHEMICAL PLANT without entering the water.

Mad Skillz

Got all custom skills.

(Hedge)Hogging It All Up!

Got all collectibles.

Time Attacker

Played Time Attack on all stages.

Red Ring Collector

Got all Red Star Rings.

Halfway Point

Cleared half the missions.

Mission Accomplished!

Cleared all the missions.
+11

11 hidden achievements remaining

Details for each achievement will be revealed once unlocked