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6 of 15 (40%) achievements earned:
Personal Achievements

Miles "Tails" Prower

Become friends with Tails.
Unlocked Dec 7, 2017 @ 5:33am

Knuckles the Echidna

Become friends with Knuckles.
Unlocked Dec 10, 2017 @ 5:46am

Amy Rose

Become friends with Amy.
Unlocked Dec 10, 2017 @ 5:52am

E-102 "γ"

Become friends with E-102.
Unlocked Dec 14, 2017 @ 8:49am

Big the Cat

Become friends with Big.
Unlocked Dec 14, 2017 @ 9:00am

Sonic the Hedgehog

Clear the Sonic story.
Unlocked Dec 14, 2017 @ 9:59am

Super Sonic

Clear all characters stories.

The Fastest & Strongest

Get Level A on all the Action Stages.

Sub Game Master

Get all Emblems of the Sub Games.

Chao's Best Friend

Get all Emblems of the Chao Race.

The Adventurer

Get all Emblems in the Adventure Field.

The Perfect Adventurer

Get all 130 Emblems.

Metal Sonic

Get all 130 Emblems by playing Sonic Adventure DX.

Metal Sonic Master

Get Level A on all the Action Stages by using Metal Sonic.

Mission All Accomplished

Clear all 60 missions.