Letter Quest: Grimm's Journey Remastered

If you don't happen upon this achievement naturally while playing, it can be easily gotten in stage 26. Duplicator tiles have little molecular symbols on them, and when you finish a turn they duplicate themselves on nearby tiles.

In stage 26, the last enemy (the black one) will turn tiles into duplicator tiles often. When you get to him, continually hit to skip your turn until he turns all of your tiles to duplicator tiles. It's possible he could turn your tiles to whirlwind tiles, but it shouldn't take long for him to turn them all to duplicator tiles.