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.
Run 500 meters
Collect 100 coins
Score 25,000 points
Run 1,000 meters
250m collecting no coins
Complete the Daily Challenge
Find a gem
Use a 'Save Me'
Find an Artifact
Unlock a 2nd powerup
Complete a Weekly Challenge
1,000m collecting no coins
Collect 5,000 coins, overtime
Run 2,500m without tripping
Use a 'Head Start'
Collect 20 bonus items
Run 10,000 meters
Score 1,000,000 points
Collect 5,000 coins
1 million without powerups