If you are interested in the game's history or why it was so hard to find for several years, I can walk you through the "Easter egg" controversy that led to its initial removal from Steam.
Here is the current situation regarding the game's availability: devotion-free-download-pc-game-full-version
: While rarer, some physical copies were produced for specific regions, but these are generally collectors' items now. Why avoid "Free Download" sites? If you are interested in the game's history