Full list of all 15 Sonic Adventure 2 achievements worth 500 gamerscore. It takes around 35-40 hours to unlock all of the achievements in the base game.
The base game contains 12 achievements worth 400 Gamerscore, and there is 1 DLC pack containing 3 achievements worth 100 Gamerscore.
You have successfully unlocked the HERO and DARK gardens.
Time to raise your Chao.
Your skill is top notch!
You are the Sonic expert now!
My hero, you have successfully saved the world!
You have cleared our DARK story.
Half way to go!
Welcome to the Chao World!
Now you are the master of this stage.
Excellent driving skills!
You have cleared our HERO story.
Hello, rookie, welcome to the Sonic World!
You have unlocked every secret of this game.
You are awarded the Karate Master Title!
Secret levels unlocked!