This set of tiles are a complimentary to the Big Box Tiles if you want to play the new Amazonis Planitia map. Contents: 5 City Tiles 14 Greenery Tiles 2 Ocean Tiles 5 Domes To fit these in your Big Box, we suggest stacking all ocean tiles in 2 of the tile spaces, and then stack some of the greeneries 2 and 2. If you don’t want to stack the tiles, there are also other pockets in the Big Box where these tiles can go. The extra tiles are needed on Amazonis Planitia since it features a larger planet surface with more tile spaces, and longer global requirements, such as 11 oceans instead of 9.