Each game map in the Core Set and Expansions accommodates up to 3 players and they are designed to easily combine with more maps, thus allowing for more players. The Starter Set map squares are designed to easily mix and match as well.
How many players you can include depends on how many maps and how many people you can fit around your play area.
With more players there can also be more complications. How do you manage 4 or more people in the same game? That depends on the type of game you want to play. Check out the game formats for more ideas.
