Neverwinter Nights: Enhanced Edition Game Keys

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 "LIBRARY" tab and start downloading.

Neverwinter Nights: Infinite Dungeons is a Dungeons & Dragons adventure featuring a procedurally generated multi-level dungeon tailored to your gameplay style for characters of levels 1 to 40. Maps, encounters, and treasure change with each play, providing a unique dungeon crawling experience every adventure! You’ve journeyed to Waterdeep to explore Undermountain, the most famous dungeon in all of the Forgotten Realms. According to legend, there’s treasure to be won, puzzles to be solved, and a mystery that will lead you ever deeper.