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16 of 49 (33%) achievements earned:
Personal Achievements
 

The Opening Act

Completed the first stage.
Unlocked 22 Oct @ 9:16am

GREEN HILL Restored!

Restored the GREEH HILL stage Gate.
Unlocked 22 Oct @ 9:21am

CHEMICAL PLANT Restored!

Restored the CHEMICAL PLANT Stage Gate.
Unlocked 22 Oct @ 9:52am

SKY SANCTUARY Restored!

Restored the SKY SANCTUARY Stage Gate.
Unlocked 9 Nov @ 5:32am

SPEED HIGHWAY Restored!

Restored the SPEED HIGHWAY Stage Gate.
Unlocked 15 Nov @ 9:49am

CITY ESCAPE Restored!

Restored the CITY ESCAPE Stage Gate.
Unlocked 15 Nov @ 10:19am

SEASIDE HILL Restored!

Restored the SEASIDE HILL Stage Gate.
Unlocked 20 Nov @ 8:52am

Sunny side up

Defeated Death Egg Robot.
Unlocked 9 Nov @ 8:48am

Scrap Metal

Defeated Metal Sonic.
Unlocked 9 Nov @ 6:29am

Shadow Boxing

Defeated Shadow.
Unlocked 21 Nov @ 11:45am

Bright Star

Got Rank S in an act.
Unlocked 22 Oct @ 9:16am

Shooting Star

Got Rank S in acts three times.
Unlocked 22 Oct @ 9:25am

Trickstar

Executed a trick with a seven-step combo or longer.
Unlocked 23 Oct @ 9:53am

Eradicator

Defeated 100 enemies.
Unlocked 29 Oct @ 9:05am

Ring King

Reached the goal without dropping any of the rings you collected in GREEN HILL Act 1.
Unlocked 22 Oct @ 9:16am

Action Hero

Performed all of Sonic's actions in Act 2.
Unlocked 20 Nov @ 8:52am



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.

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.
+15

15 hidden achievements remaining

Details for each achievement will be revealed once unlocked