Railroad Ink Challenge is a quick playing roll and write game for 1 to 4 players. Railroad Ink Challenge is a quick playing roll and write game for 1 to 4 players. Grab a board and a dry-erase marker and get ready to reach networking nirvana! Expand your gaming experience with the super-colored, super-fun, super-crazy Dice Expansions for Railroad Ink Challenge! Every expansion adds a new layer to the game, changing it in unexpected ways and allowing new strategies to be explored and mastered, even for seasoned Railroad Ink Challenge players. Note: a Railroad Ink core game is required to use the Dice Expansions!