Full list of all 20 AlphaJax (Windows) achievements worth 200 gamerscore. It takes around 3-4 hours to unlock all of the achievements on Windows.
You played 50 moves in total.
You scored a word that was worth at least 100 points.
You played 200 moves in total.
After your first ten words, you had an average word scoring equal or better than 20.
You placed the word ALPHAJAX on a board.
You completed a game with no tile remaining.
You won a game with at least twice the points of your opponent.
You placed the seven letters of your rack in a single move.
You placed a 10 points letter on a Triple Letter bonus tile.
You were the first of a game to use a Triple Word Bonus Tile.
You scored two Triple Letter Bonus Tiles with a single word.
You won 5 games in a row.
You played 100 moves in total.
You rematched a player that you've lost against.
You created a new random game.
You created a new skill match game.
You played 10 games at the same time.
You completed a game with at least 300 points.
You won 10 games.
You won a game.