Microsoft Ultimate Word Games

To obtain the Expert title, you have to reach level 80 in Crosswords. Everything you do in Crosswords awards you experience: daily challenges, adventure map levels, and Sunday puzzles. Unfortunately, unlike the other two game types, there is no quickplay option for Crosswords since the puzzles aren't randomly generated. This means that the only way to reach level 80 is by completing adventure maps and Sunday puzzles. Daily challenges will help a little, but the amount of experience they offer is incredibly small compared to how much you get for earning three stars on an adventure map level.

In other sections of the guide I suggested upgrading to Premium, but here is where I highly recommend it. The double experience will save you a ton of time in this game mode, since you have no fast quickplay sessions for Crosswords. If you don't upgrade to Premium, you will need to do literally every Crosswords daily challenge, complete every adventure map, and complete every Sunday puzzle from April 2017 to October 2017 to reach level 80. As you can imagine, this will take a lot of time. Over half of your total playtime with this game will be getting to level 80 in Crosswords.

With the Premium upgrade, I reached level 80 after only 4 adventure maps, skipping the longer bonus puzzles, and only one month of Sunday puzzles. Since all crossword puzzles give you experience based on stars, not on size of the puzzle, the smaller puzzles are most efficient, meaning if you upgrade to Premium, you can do the first 15 puzzles on all adventure maps first, since those are the smallest and easiest, and then only do the second 15 puzzles on a couple maps to mop up whatever experience you still need. The smaller 10x10 puzzles can be completed very quickly. I was averaging 1-2 minutes per puzzle, whereas the Sunday puzzles and bonus puzzles were taking me 10-20 minutes. So being able to focus on the smaller puzzles cuts down time tremendously.

Also keep in mind you can use hints as needed. I would typically go as fast as possible by changing the settings that when you finish entering an answer it automatically jumps to the next answer, and whenever I didn't know an answer just by looking at the clue, I'd use a hint to give me the first letter and then keep moving.

Upon reaching level 80, your title will change to "Crosswords Expert" and the achievement will unlock.