Killing Floor 2 had Steam trading card support added on 29 October 2015. There are 8 cards in the series, and you'll receive 4 cards at random for purchasing and playing the game.
Killing Floor also has trading card support.
Trading Cards
Foil Cards
Badges
Level 1 Horzine Trainee Guard
Level 2 Horzine Junior Guard
Level 3 Horzine Senior Guard
Level 4 Horzine Security Trooper
Level 5 Horzine Senior Security Trooper
Foil Badge Horzine Security Captain
Booster Packs
Booster pack crafting cost is 750 gems.
Incinerate N Detonate update
Halloween Horrors: Monster Masquerade (2018)
Twisted Christmas: Season's Beatings (2018)
Cyberpunk: Cyber Revolt (2019)
Summer Sideshow: Back And Kickin' Brass (2019)
Halloween Horrors: Grim Treatments (2019)
Twisted Christmas: Yuletide Horror (2019)
Cyberpunk: Neon Nightmares (2020)
Summer Sideshow: Perilous Plunder (2020)
Halloween Horrors: Infernal Insurrection (2020)
Twisted Christmas: Christmas Crackdown (2020)
Summer Sideshow: Interstellar Insanity (2021)
Halloween Horrors: Day Of The Zed (2021)
Twisted Christmas: Chop Til' You Drop (2021)
Summer Sideshow: Tidal Terror (2022)
Halloween Horrors: Blood And Bonfires (2022)
Summer Sideshow: Deep Blue Z (2023)
Emoticons
Profile Backgrounds
Foster and Scully (Uncommon )
Card Artwork