Battlefield Hardline was released on Steam with trading card support on 11 June 2020. There are 5 cards in the series, and you'll receive 3 cards at random for purchasing and playing the game.
Other games in the series, Battlefield 1, Battlefield 3, Battlefield 4, Battlefield V, Battlefield 2042 and Battlefield: Bad Company 2 also have trading card support.
Trading Cards
Foil Cards
Badges
Booster Pack
Emoticons
Profile Backgrounds