Age of Steam: Moon and Berlin Wall includes two expansions for Age of Steam previously released in limited editions by designer Alban Viard.
The Moon expansion (first released in 2005) has a "spherical" game board so track can be built off the edges and connect on the opposite side of the board. Play is also affected by the Night & Day phases of the moon. Players must build from the central hex (which counts as a city but has no color or goods) or cities linked to it. The Engineer action now enables players to build three pieces of track. Another new action, Low Gravitation, allows the use of one link belonging to another player during goods and movement phases.
The Berlin Wall expansion (first released in 2008) features a new Engineer action allowing a player to build three pieces of track or remove one red track marker from the board. Goods may be delivered from east to west (and vice versa) only through holes in the wall by removing the red track markers. Red cubes represent the Soviet Army and Blue cubes the American, British and French forces; movement of these cubes is restricted until the round marker reaches the red player marker that was placed at the start of the game. At this point all restrictions are removed!
NOTE: Age of Steam: Moon and Berlin Wall comes packaged inside a box that can hold many AoS expansion maps.