Las Vegas Boulevard, labeled the first expansion for Las Vegas, includes several modules that players can use individually or in combination, specifically:
Eight dice in two new colors (yellow & grey) to allow for up to seven players.
Purple dice (10 in total) that allow you to remove an opponent's or one's own die when placed (with enough purple dice to have up to eight players).
A large die in each color, except purple (7 in total), that counts as two dice when determining who scores at a casino.
Two white dice to play the basic variant with up to 7 players.
Rules for playing a solitaire version of the game.
Rules for playing a variant of the game.
Five bills worth $100,000.
Ten one-shot cards (Action cards / blue), with each player receiving one such card at the start of each round.
Ten special cards (Bonus cards / green).
Six special cards (Rainbow cards) of variable random value.
A new, seventh casino (Slot Machine); on a turn, a player can place all the dice he rolled of a single number in this casino, but then no more dice of this number can be placed in this casino by any player.
One summary card.
(Note that Las Vegas Boulevard was initially announced as Las Vegas Lights and later renamed Las Vegas Plus.)