Railroad Ink Challengeâ„¢ 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. Railroad Ink Challenge Dice Expansion Arcade Pack.Note: a Railroad Ink core game is required to use the Dice Expansions The Underground Expansion Pack contains 4 dice that you can use in two ways.Use the 4 special dice of the Arcade Expansion Pack in addition to your regular Route dice, and find new ways to score points: Pluck-Man (1 die): feed Pluck-Man with enough Fruits to eat those pesky Ghost , Tetromino (1 die): respect your commitment for urban planning to gain precious points , Galactic Invaders (1 die): send Aliens to attack your opponents while trying to defend against those invading you , and Rainbow (1 die): populate your board with colorful rainbows and send ominous clouds to your adversaries