Work your way up from small-time crook to boss of the underworld in this strategic simulation set in the Golden Twenties by setting up speakeasies, gambling dens and distilleries. Recruit a hard-hitting crew armed with a variety of lethal weapons and equipment for tactical turn-based combat. Match wits with the AI or work your way up the global leaderboards in action-packed online duels.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.