Kombat Pack 2 grants access to 4 new playable characters, as well as previously released content including Goro, Kold War Skin Pack and 2 Klassic Fatality Packs. New characters include Horror icon Leatherface, and the Xenomorph from Alien . Bo’ Rai Cho and Triborg the Cyber Ninja complete the offer. Also includes the Apocalypse Pack with three new character skins.
Open the Steam client, login and locate the Games tab on the top menu. Click this and then select “Activate a Product on Steam…”
Enter your unique code that's displayed on the 'Orders' page of CDKeys.com and follow the prompts to activate.
Your game is now viewable in the “Library” tab and is available to download/install when you’re ready. You can find additional support for the Steam client here: https://help.steampowered.com/en/wizard/HelpWithSteam