There are 6 map sizes and 5 map types required to get this achievement.
Sizes: Duel, Tiny, Small, Standard, Large, and Huge
Types: Continents, Pangaea, Archipelago, Fractal, and Earth
It will take at least 6 games to complete these so pair a size with a type in order to complete this most efficiently. Keep in mind you have to win, so it's best doing it on a difficulty you are comfortable with.