Sniper Elite V2 had Steam trading card support added on 15 May 2014. There are 9 cards in the series, and you'll receive 5 cards at random for purchasing and playing the game.
The game has since gotten a remaster, which has its own separate set of trading cards. In addition, the other games in the series, Sniper Elite, Sniper Elite 3, Sniper Elite 4 and Sniper Elite 5 also have trading card support.
Trading Cards
Foil Cards
Badges
Booster Pack
Emoticons
Profile Backgrounds