Kombat Pack includes: 6 new add-on playable characters including Shang Tsung, Nightwolf, Terminator T-800, Sindel, The Joker and Spawn 7 Kombat Pack Exclusive Character Skins for Johnny Cage, Sonya Blade, Cassie Cage, Jacqui Briggs, Geras and Shang Tsung 6 themed Skin Packs including the Klassic Arcade Ninjas, Klassic Arcade Fighters, Double Feature, Gothic Horror, Matinee and DC Elseworlds

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.