This achievement is not too hard. It just takes a little while. There are 5 different ranks you can earn, Bronze (what you start with), silver, gold, platinum, and last diamond. Each level takes about 3 or so games depending on the score you get, I was getting around 300-500 points each game, but if you are getting lower than that than it will take more games. so just use the settings I am going to recommend and you should start getting a pretty high score. Start a local game and pick solo, bonus tile On, Time attack On, Word find On,, and the rest are turned off. This will give you the highest possible score for each round of boggle. Then start the game and just get the words in as fast as you can. Again it takes 3-4 games to rank up if you are using the correct settings. Takes about 2-3 hours (results may very depending on how many points the boggle board gives you that round) Also remember to not quit in the middle of a game because chances are it's going to lower your rank. Thanks.