Already Own the Game, how to access via Steam?

[Mystyrys]

I purchased this game on Big Fish back in 2010. I do not have, or cannot find a product key to enter so that I can access the game through Steam. How do I access the game on Steam without having to buy it again?

[InPinkClover]

I Googled the following: Big Fish Steam Keys

The Answer: Retail CD-Keys for this game cannot be registered through Steam. If you wish to create a shortcut to this game under the Library tab, instructions can be found here:
https://support.steampowered.com/kb_article.php?ref=2219-YDJV-5557

Important:
This will only add a shortcut to your game in the Steam client. This will not allow you to download updates for your game through Steam nor allow you to use this game as proof of ownership for your Steam account. Only games purchased or registered through Steam can receive automatic updates and function as proof of ownership for a Steam account.

Adding a shortcut to a non-Steam game
Launch Steam.
Click the Games menu, choose Add a Non-Steam Game to My Library.
Browse for games on your computer or put a check next to the game(s) you wish to add to the Library.
Click Add Selected Programs