1. Visit the official website of GOG.com (Good Old Games).
2. Search for "James Bond 007: Nightfire" in the search bar.
3. Click on the game's title to open its product page.
4. Click on the "Add to cart" button.
5. Follow the instructions to complete the purchase and download the game.
Here are some additional details:
- GOG.com is a reputable website that offers DRM-free games (meaning you can play them without any restrictions).
- The game is available for Windows PCs.
- You will need to create a GOG.com account to download and play the game.
- The game is available for purchase for a one-time fee.