This expansion allows you to build your own monorail into your zoo as you try to meet new special monorail objectives for added variety and challenge! The expansion also adds co-operative play for up to 5 players as you all work together to build a 6x6 mega zoo. Meet all of the co-operative objectives and win! This expansion works seamlessly with either the Retail or Deluxe versions of the game. The Monorail Expansion adds: - A new build action - A new attraction - New monorail objectives - New co-op objectives Includes 4 monorail trains & 14 monorail track pieces