Costume Quest is a rollicking Adventure/Role-Playing game that unfolds on Halloween night across seemingly peaceful suburban neighborhoods, a mysterious village carnival, and a monster-infested shopping mall. Created by Double Fine's lead animator, Tasha Harris, the game follows the adventure of a group of young friends who must rid their neighborhood of monsters using only their wits, their bravery, and their home-made costumes. Players go door-to-door collecting candy, points, cards, battle stamps and quest assignments as they prepare themselves for Combat Mode-where they transform into larger-than-life versions of their costumes. Each costume that comes-to-life provides its own unique set of superpowers that players will need to battle Halloweens worst monsters.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.