Full list of all 20 AlphaJax achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Windows Phone.
Clear your rack in a single move
Play your first 50-74 words
Play your first 75-99 words
Play your first 100+ words
Win your first game
Win a game by less than 5 points
Score a word multiplier and a letter multiplier with one word
Play a game with a friend
Play a skill match game
Play a rematch
Create a random game
Start 5 games by inviting other players
Complete your first game with no tiles remaining
Score 2 word multipliers with one word
Score 300-399 in a game
Play 10 games
Play 50 games
Score 400-449 in a game
Score 450+ in a game
Get a rating of 1500+