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 20 bonus items
Run 2,500m without tripping
Used a 'Head Start'
Collected 5,000 coins, overtime
1,000m collecting no coins
Unlocked a 2nd powerup
Completed a Weekly Challenge
Completed the Daily Challenge
Found an Artifact
Used a 'Save Me'
Found a gem
250m collecting no coins
Ran 1,000 meters
Ran 500 meters
Collected 100 coins
Scored 25,000 points
Run 10,000 meters
Score 1,000,000 points
Collect 5,000 coins
1 million without powerups