CLAD in IRON: Gulf of Mexico 1864 is a American Civil War alternate history naval game in which a turned-based wargame and a real-time strategy are combined. Alternate history is a genre of fiction consisting of stories in which historical events occur differently. These stories contain "what if" scenarios at crucial points in history and present outcomes other than those in the historical record.

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.