To be able to collect Game Cards, you need to open Game Packs.
Game Packs are bundles of Game Cards that you can open to receive Game Cards. Each Game Pack includes 5 Game Cards.
When opening a Game Pack you are able to receive different rarities of Game Cards ranging from Common, Rare, Epic & Legendary.
Certain Game Packs will give you a higher chance of receiving rare cards, or even guarantee a specific rarity.
Game Packs can either be bought or earned by playing the game.