The Ultimate KF2 editions contains:
Killing Floor 2 Standard Edition
Killing Floor 2 Deluxe Edition Upgrade
Armory Season Pass 2021
Armory Season Pass 2022
...and following standalone DLC Bundles:
Mrs. Foster
Cyberpunk Outfit Bundle
Headshot FX Pack 1 and 2
Wasteland Bundle
Foster Classic Bundle
Briar’s Bobby Bundle
Tanaka’s Biker Bundle
Horzine Mark 7 Bundle
Hazmat Suit Bundle
DAR Assault Armor Bundle
Commando Chicken Bundle
Pajama Bundle
Clot Backpack Bundle
Dragon & Koi Complete Weapon Skin Set
Badass Santa Bundle
Cardboard Knight Bundle
Witch Hunter Outfit Bundle
Santa’s Helper Outfit Bundle
Foster’s Favorites Weapon Skin Pack
Space Pirate Outfit Bundle
Space Pirate Full Gear Bundle
Reaper Outfit Bundle
Halloween 2020 Full Gear Bundle
Christmas 2020 Full Gear Bundle
Winter 2020 Gear Cosmetic Bundle
Key activation instruction