With the introduction of Steam trading cards to Dota 2, active players have started receiving Dota 2 booster packs that contain 3 Dota 2 Steam cards each. These tradable items and can be bought and sold in the Steam Community Market.
What are Dota 2 Booster Packs?
These are Steam Booster Packs that contain trading cards that are added to your Steam inventory upon activation. There is a small chance that the booster pack you open contains a rare foil version of the Dota 2 cards.
How do I get Dota 2 Booster Pack?
Booster packs are randomly dropped to active Dota 2 players as more badges are crafted by members of the community. You can also trade with other players or buy from the Steam community market.