Microworld has modular rules that you combine to create several different scenarios. This promo supplies two new additional rule tiles that you can add to the base game to increase the variability of the game even more. The first additional rule (B1) applies during the setup: it gives a personal secret goal tile to the players, but only the first player who reach the goal will score the points. Moreover, you will find a bonus Goal Tile in the promo. The second additional rule (D1) applies during the game. It establishes that when players place in outside cells they will score one more point.