This expansion is part of the second set of Age of Steam expansions designed by the Steambrothers.
On the Spain/Portugal map, team play is the main new change but there is a variant that allow players to play it individually. There are also new rules that concerns the difference of gauge between Spain and the rest of Europe and there is one new action called insurrection.
The Mexico map features a new special action called Nationalization, which, thematically, involves player track being nationalized. This last action adds great interaction between players.
As in our first expansions, you will experience new and exciting actions and mechanisms in addition to this great game, Age of Steam.
See here on how to get a copy: http://www.boardgamegeek.com/thread/154347