Terraforming Mars: Small Box 3D terrain tiles to dress up the game. Included in the box are:

24 city tiles (four each of six designs)

40 forest tiles (eight each of five designs)

9 ocean tiles

14 special tiles (the original eleven, plus three new ones)

Terraforming Mars: Big Box also includes three new cards that relate to the three new special tiles, card dividers, and five plastic markers for the global parameters.