Since some older versions are now considered "abandonware," you can find legitimate copies preserved by the Internet Archive for educational and historical purposes. Modern Alternatives:
If you love the gameplay of Cooking Academy, many modern titles offer similar experiences for free or at a low cost, such as Cooking Fever Cooking Simulator available on Conclusion Cooking Academy Activation Code Code List Full
Codes for the original PC version often won't work for different iterations like Cooking Academy 2: World Cuisine or the mobile versions. How to Actually Get the Full Version Since some older versions are now considered "abandonware,"