Includes: 3 ADDITIONAL LEVELSExperience blood-curdling new campaign missions for 1-4 players. NEW CHARACTER OUTFIT BUNDLESDress up your characters with new outfits and hats. NEW WEAPON BUNDLESWeapon bundles including new weapons, charms, skins and more. NEW WEAPON SKIN PACKSCustomise your weapons, with effects ranging from occult to toxic hazard. NEW HEADGEAR BUNDLES AND CHARM PACKSChange up your look with new headgear, and add some flair to your weapons with new charms. Hitler’s hordes are back for more in this spine-chilling shooter from the makers of Sniper Elite 4! Abominable occult enemies, epic weapons and a harrowing new campaign for 1-4 players await in 1940s Europe, as you fight to save humankind from undead Armageddon! Zombie Army 4: Dead WarHitler’s hordes are back for more in this spine-chilling shooter from the makers of Sniper Elite 4! Abominable occult enemies, epic weapons and a harrowing new campaign for 1-4 players await in 1940s Europe, as you fight to save humankind from undead Armageddon!

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "MY GAMES" tab and start downloading.