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 200 moves in total.
You completed a game with at least 300 points.
You scored a word that was worth at least 100 points.
You completed a game with no tile remaining.
You placed a 10 points letter on a Triple Letter bonus tile.
You placed the word ALPHAJAX on a board.
You were the first of a game to use a Triple Word Bonus Tile.
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.
After your first ten words, you had an average word scoring equal or better than 20.
You scored two Triple Letter Bonus Tiles with a single word.
You placed the seven letters of your rack in a single move.
You played 50 moves in total.
You played 10 games at the same time.
You won 5 games in a row.
You won 10 games.
You won a game with at least twice the points of your opponent.
You won a game.