Star Realms: Gambit incorporates both the Gambit set and the Year One organized play promo cards from the physical card game.
The game changes in powerful ways with a new type of card — the Gambit. There are nine of them, and each player is given two of them at random to begin the game. When do you use your Gambits? When do you make your move? The war continues, and now the stakes are even higher!
The expansion contains 18 cards: one base and one ship per faction, nine Gambits, and one unaligned ship. It also contains thirteen new missions spread across two new campaigns.
Source: The Publisher Website.