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49 of 49 (100%) achievements earned:
Personal Achievements
 

The Opening Act

Completed the first stage.
Unlocked 11 Sep, 2017 @ 3:12am

GREEN HILL Restored!

Restored the GREEH HILL stage Gate.
Unlocked 11 Sep, 2017 @ 3:17am

CHEMICAL PLANT Restored!

Restored the CHEMICAL PLANT Stage Gate.
Unlocked 19 Sep, 2017 @ 11:40pm

SKY SANCTUARY Restored!

Restored the SKY SANCTUARY Stage Gate.
Unlocked 28 Dec, 2017 @ 6:23pm

SPEED HIGHWAY Restored!

Restored the SPEED HIGHWAY Stage Gate.
Unlocked 28 Dec, 2017 @ 7:30pm

CITY ESCAPE Restored!

Restored the CITY ESCAPE Stage Gate.
Unlocked 29 Dec, 2017 @ 7:06pm

SEASIDE HILL Restored!

Restored the SEASIDE HILL Stage Gate.
Unlocked 31 Dec, 2017 @ 12:04am

CRISIS CITY Restored!

Restored the CRISIS CITY Stage Gate.
Unlocked 3 Jan, 2018 @ 8:13pm

ROOFTOP RUN Restored!

Restored the ROOFTOP RUN Stage Gate.
Unlocked 3 Jan, 2018 @ 8:44pm

PLANET WISP Restored!

Restored the PLANET WISP Stage Gate.
Unlocked 3 Jan, 2018 @ 9:22pm

Sunny side up

Defeated Death Egg Robot.
Unlocked 28 Dec, 2017 @ 7:08pm

Perfect Punisher

Defeated Perfect Chaos.
Unlocked 31 Dec, 2017 @ 12:40am

Boom Boom Dragoon

Defeated Egg Dragoon.
Unlocked 3 Jan, 2018 @ 11:51pm

Scrap Metal

Defeated Metal Sonic.
Unlocked 28 Dec, 2017 @ 6:26pm

Shadow Boxing

Defeated Shadow.
Unlocked 31 Dec, 2017 @ 12:07am

Silver Got Served

Defeated Silver.
Unlocked 3 Jan, 2018 @ 11:11pm

Treasure Hunter

Collected all the Chaos Emeralds.
Unlocked 3 Jan, 2018 @ 11:53pm

All Stages Clear!

Cleared Sonic Generations.
Unlocked 4 Jan, 2018 @ 12:19am

Greased Lightning

Cleared Green Hill within one minute.
Unlocked 18 Jan, 2018 @ 6:55pm

Bright Star

Got Rank S in an act.
Unlocked 11 Sep, 2017 @ 3:17am

Shooting Star

Got Rank S in acts three times.
Unlocked 3 Jan, 2018 @ 10:34pm

Blazing Meteor

Got Rank S in acts seven times.
Unlocked 6 Jan, 2018 @ 3:38am

Blue Comet

Got Rank S in acts 12 times.
Unlocked 20 Jan, 2018 @ 8:06pm

Big Bang

Got Rank S in all acts.
Unlocked 2 Mar, 2018 @ 11:33pm

Trickstar

Executed a trick with a seven-step combo or longer.
Unlocked 3 Jan, 2018 @ 6:33pm

Eradicator

Defeated 100 enemies.
Unlocked 28 Dec, 2017 @ 6:48pm

Ring King

Reached the goal without dropping any of the rings you collected in GREEN HILL Act 1.
Unlocked 3 Jan, 2018 @ 10:43pm

Action Hero

Performed all of Sonic's actions in Act 2.
Unlocked 4 Jan, 2018 @ 4:52pm

Can't Touch This

Took no damage while defeating the final boss.
Unlocked 20 Jan, 2018 @ 8:08pm

Bonds of Friendship

Completed all of Sonic's friends' Challenges.
Unlocked 18 Jan, 2018 @ 7:29pm

Walkie Talkie

Chatted with all of Sonic's friends you saved.
Unlocked 6 Jan, 2018 @ 4:12am

Join the Ranks

Joined the rankings.
Unlocked 29 Dec, 2017 @ 6:53pm

A 30-Second Test

Participated in a 30 Second Trial.
Unlocked 29 Dec, 2017 @ 6:49pm

Jump for Joy!

Found the spring hidden in GREEN HILL Act 1 and reached the goal with a Red Star Ring.
Unlocked 4 Jan, 2018 @ 4:20pm

Walk on Water

Cleared CHEMICAL PLANT without entering the water.
Unlocked 6 Jan, 2018 @ 3:17am

Walk on Air

Cleared SKY SANCTUARY without falling even once.
Unlocked 6 Jan, 2018 @ 3:23am

The Byway or the Highway

Got the Red Star Ring located on the shortcut route in SPEED HIGHWAY.
Unlocked 20 Jan, 2018 @ 8:06pm

Demolition Derby

Wrecked 30 or more cars in CITY ESCAPE.
Unlocked 28 Dec, 2017 @ 7:23pm

Secret Sleuth

Got the Red Star Ring located in the hidden room in SEASIDE HILL.
Unlocked 27 Feb, 2018 @ 12:20am

Look Both Ways

Reached the goal in CRISIS CITY without being hit by a tornado-carried car.
Unlocked 20 Jan, 2018 @ 8:06pm

A Quick Breather

Got the Red Star Ring atop the highest spot in ROOFTOP RUN.
Unlocked 3 Jan, 2018 @ 8:25pm

Color Power!

Got the Red Star Ring by using an Orange Wisp in PLANET WISP.
Unlocked 28 Feb, 2018 @ 3:39pm

Supersonic!

Cleared a regular stage as Super Sonic.
Unlocked 5 Jan, 2018 @ 7:27pm

Mad Skillz

Got all custom skills.
Unlocked 28 Feb, 2018 @ 3:39pm

(Hedge)Hogging It All Up!

Got all collectibles.
Unlocked 28 Feb, 2018 @ 3:39pm

Time Attacker

Played Time Attack on all stages.
Unlocked 5 Mar, 2018 @ 11:19pm

Red Ring Collector

Got all Red Star Rings.
Unlocked 28 Feb, 2018 @ 3:39pm

Halfway Point

Cleared half the missions.
Unlocked 18 Jan, 2018 @ 10:56pm

Mission Accomplished!

Cleared all the missions.
Unlocked 25 Feb, 2018 @ 10:19pm