MMP Supply Pack Charlie is the third official multiplayer DLC for Men of War: Assault Squad and includes 5 new maps for competitive multiplayer that support different numbers of players. Each map contains its own environment and battle landscape. The 5 new multiplayer maps are for the Assault Zones and Combat game modes, as well as for the exclusive game mode of the Day of Victory DLC.
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