This item is already included in the Kombat Pack. Three new character skins. The Klassic Arcade Ninja Skin Pack outfits Mortal Kombat 11 characters Scorpion, Sub-Zero and Noob Saibot in Klassic, Arcade inspired costumes.

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.