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

The Opening Act

Completed the first stage.
Unlocked 3 Feb, 2013 @ 11:38am

GREEN HILL Restored!

Restored the GREEH HILL stage Gate.
Unlocked 3 Feb, 2013 @ 11:47am

CHEMICAL PLANT Restored!

Restored the CHEMICAL PLANT Stage Gate.
Unlocked 2 Apr, 2013 @ 12:42pm

SKY SANCTUARY Restored!

Restored the SKY SANCTUARY Stage Gate.
Unlocked 2 Apr, 2013 @ 4:39pm

SPEED HIGHWAY Restored!

Restored the SPEED HIGHWAY Stage Gate.
Unlocked 4 Apr, 2013 @ 3:09pm

CITY ESCAPE Restored!

Restored the CITY ESCAPE Stage Gate.
Unlocked 4 Apr, 2013 @ 3:38pm

SEASIDE HILL Restored!

Restored the SEASIDE HILL Stage Gate.
Unlocked 5 Apr, 2013 @ 12:13pm

CRISIS CITY Restored!

Restored the CRISIS CITY Stage Gate.
Unlocked 13 Apr, 2013 @ 2:05pm

ROOFTOP RUN Restored!

Restored the ROOFTOP RUN Stage Gate.
Unlocked 13 Apr, 2013 @ 9:43pm

PLANET WISP Restored!

Restored the PLANET WISP Stage Gate.
Unlocked 26 Apr, 2013 @ 1:41pm

Sunny side up

Defeated Death Egg Robot.
Unlocked 3 Apr, 2013 @ 4:11pm

Perfect Punisher

Defeated Perfect Chaos.
Unlocked 13 Apr, 2013 @ 1:50pm

Boom Boom Dragoon

Defeated Egg Dragoon.
Unlocked 3 May, 2013 @ 3:10pm

Scrap Metal

Defeated Metal Sonic.
Unlocked 3 Apr, 2013 @ 3:57pm

Shadow Boxing

Defeated Shadow.
Unlocked 13 Apr, 2013 @ 1:42pm

Silver Got Served

Defeated Silver.
Unlocked 3 May, 2013 @ 3:05pm

Treasure Hunter

Collected all the Chaos Emeralds.
Unlocked 3 May, 2013 @ 3:11pm

All Stages Clear!

Cleared Sonic Generations.
Unlocked 3 May, 2013 @ 3:36pm

Greased Lightning

Cleared Green Hill within one minute.
Unlocked 4 Apr, 2013 @ 4:05pm

Bright Star

Got Rank S in an act.
Unlocked 3 Feb, 2013 @ 11:38am

Shooting Star

Got Rank S in acts three times.
Unlocked 2 Apr, 2013 @ 12:31pm

Blazing Meteor

Got Rank S in acts seven times.
Unlocked 4 Apr, 2013 @ 2:55pm

Blue Comet

Got Rank S in acts 12 times.
Unlocked 5 Apr, 2013 @ 12:30pm

Big Bang

Got Rank S in all acts.
Unlocked 27 Apr, 2013 @ 10:47am

Trickstar

Executed a trick with a seven-step combo or longer.
Unlocked 1 Apr, 2013 @ 1:41pm

Eradicator

Defeated 100 enemies.
Unlocked 1 Apr, 2013 @ 1:47pm

Ring King

Reached the goal without dropping any of the rings you collected in GREEN HILL Act 1.
Unlocked 3 Feb, 2013 @ 11:38am

Action Hero

Performed all of Sonic's actions in Act 2.
Unlocked 4 Apr, 2013 @ 3:11pm

Can't Touch This

Took no damage while defeating the final boss.
Unlocked 13 Nov, 2014 @ 2:47pm

Bonds of Friendship

Completed all of Sonic's friends' Challenges.
Unlocked 3 May, 2013 @ 2:49pm

Walkie Talkie

Chatted with all of Sonic's friends you saved.
Unlocked 27 Apr, 2013 @ 10:49am

Join the Ranks

Joined the rankings.
Unlocked 4 May, 2013 @ 1:18pm

A 30-Second Test

Participated in a 30 Second Trial.
Unlocked 4 May, 2013 @ 1:16pm

Jump for Joy!

Found the spring hidden in GREEN HILL Act 1 and reached the goal with a Red Star Ring.
Unlocked 31 Mar, 2013 @ 5:41pm

Walk on Water

Cleared CHEMICAL PLANT without entering the water.
Unlocked 3 Apr, 2013 @ 3:25pm

Walk on Air

Cleared SKY SANCTUARY without falling even once.
Unlocked 2 Apr, 2013 @ 2:44pm

The Byway or the Highway

Got the Red Star Ring located on the shortcut route in SPEED HIGHWAY.
Unlocked 4 Apr, 2013 @ 3:12pm

Demolition Derby

Wrecked 30 or more cars in CITY ESCAPE.
Unlocked 4 Apr, 2013 @ 3:37pm

Secret Sleuth

Got the Red Star Ring located in the hidden room in SEASIDE HILL.
Unlocked 5 Apr, 2013 @ 12:01pm

Look Both Ways

Reached the goal in CRISIS CITY without being hit by a tornado-carried car.
Unlocked 13 Apr, 2013 @ 2:10pm

A Quick Breather

Got the Red Star Ring atop the highest spot in ROOFTOP RUN.
Unlocked 13 Apr, 2013 @ 9:43pm

Color Power!

Got the Red Star Ring by using an Orange Wisp in PLANET WISP.
Unlocked 26 Apr, 2013 @ 1:39pm

Supersonic!

Cleared a regular stage as Super Sonic.
Unlocked 4 May, 2013 @ 1:03pm

Mad Skillz

Got all custom skills.
Unlocked 3 May, 2013 @ 3:37pm

(Hedge)Hogging It All Up!

Got all collectibles.
Unlocked 3 May, 2013 @ 3:36pm

Time Attacker

Played Time Attack on all stages.
Unlocked 13 Jun, 2013 @ 8:38pm

Red Ring Collector

Got all Red Star Rings.
Unlocked 27 Apr, 2013 @ 10:47am

Halfway Point

Cleared half the missions.
Unlocked 13 Apr, 2013 @ 10:22am

Mission Accomplished!

Cleared all the missions.
Unlocked 3 May, 2013 @ 2:59pm