To find the key for the main game:
• Select the Games tab in Uplay
• Click on the tile of the game
• On the left hand side under Play click on Show key
If the game isn't installed yet it will read Download instead.
• You will now be shown the key to activate the main game
If you click on Copy you can paste the key in when prompted.
To find any additional keys:
• Click your account name in the top right hand corner of the application
If you are unable to locate your key, please reach out to us with screenshot of the My Games section, showing the absence of the key.