Gems are items that will allow you to obtain cards in the engine room. To enter the room, you must select the option "Get more cards" that you will see under the Album in the game's Shop. The amount of gems required will depend on each machine.
You will have different ways to obtain them:
- Through card prizes: we recommend using the cards that give you the most gems possible in the shortest time.
- Completing the gem bar: every time you answer a question correctly in classic games, you will score two points for the gem bar. As soon as this is completed (50 points), you will get a gem. You will see the gem bar at the bottom of the screen, once you answer the question.
- Buying them in the game store.
- Through the prize roulette.
We recommend that you visit the article: What are cards for? to better understand how cards work within the game.