Full list of all 17 Wordament (Windows) achievements worth 200 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Windows.
Complete 10 rounds
Rotate the board and find more words in a round
Beat all your Frenemies in a round
Play Wordament in more than one language
Find a digram word in a round
Find a theme word in a round
Complete 100 rounds
Place better than 50% of the players in a round
Find the longest possible word in a round
Find all the digrams in a round
Find all the themed words in a round
Find words that use all 16 tiles at least once in one round
Achieve the highest cumulative score, for the hour, of any player on the hourly leaderboard
Place in the top 10% of a round
Finish first place in a round
Finish 10 rounds ranked in the top 10
Become Champ by placing in the top 250 players in any of the "Top Player" leaderboards.