The Steam versions of both System Shock: Enhanced Edition and System Shock 2 have digital trading cards that can be unlocked through play time.
Card Lists
System Shock: Enhanced Edition
System Shock: Enhanced Edition had Steam trading card support added on October 25, 2015. There are 7 cards in the series, and you'll receive 4 cards at random for purchasing and playing the game.
Trading Cards
Foil Cards
Badges
Booster Pack
Emoticons
Profile Backgrounds
System Shock 2
System Shock 2 had Steam trading card support added on July 13, 2013. There are 5 cards in the series, and you'll receive 3 cards at random for purchasing and playing the game.