The Sky Expansion Pack contains 2 unique expansions:

• Weather (2 dice)
• Airline (2 dice)

Control clouds, rain, and snow and prevent weather fronts from colliding to score bonus points with the Weather Expansion, or use air routes and airports to extend your networks to the sky with the Airline Expansion!

Note: at least one core set of Railroad Ink™ or Railroad Ink Challenge™ is required to use this expansion pack.