Full list of all 20 Temple Run 2 achievements worth 200 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Windows Phone.
Collected 5,000 coins
1 million without powerups
Scored 1,000,000 points
Ran 10,000 meters
Run 2,500m without tripping
Collected 20 bonus items
Used a 'Head Start'
Collected 5,000 coins, overtime
1,000m collecting no coins
Used a 'Save Me'
Unlocked a 2nd powerup
Found an Artifact
Completed a Weekly Challenge
Found a gem
Completed the Daily Challenge
250m collecting no coins
Ran 1,000 meters
Ran 500 meters
Collected 100 coins
Scored 25,000 points