DirecTV has a scrabble game in game lounge. In the game, you have to form a word with the given letters and each letter has a point like scrabble. You get points based on the letters in the word. And when you form a word, those letters are replaced with new letters and the game continues till you make some target score within a timeframe.

I am looking to play same game on computer. Does anyone know what is this variation of scrabble called and where can I find it?