Microsoft Ultimate Word Games

The only tricky part about this one is purposely avoiding getting all three stars before you find 30 words, since it typically only takes 5-15 words to finish a Wordament session. If you have a grid with a multi-letter tile, you can just avoid it completely, or if you're playing an adventure map level with a star for finding a 12-letter word, it's very easy to avoid finding a 12-letter word.

Then it's just a matter of spamming 3- and 4- letter words all around the grid until you reach 30 words, then finish the session (either by completing all stars or choosing Next Puzzle) and the achievement will unlock.