Unity is written in C/C++ (http://answers.unity3d.com/questions/9675/is-unity-engine-written-in-monoc-or-c.html http://answers.unity3d.com/questions/9675/is-uni

Unity is written in C/C++ (http://answers.unity3d.com/questions/9675/is-unity-engine-written-in-monoc-or-c.html http://answers.unity3d.com/questions/9675/is-unity-engine-wr...) And I guess by the answer that C is just for the API for other languages. As there is no way of doing that in C++ without an standard ABI(https://en.wikipedia.org/wiki/Application_binary_interface https://en.wikipedia.org/wiki/Application_binary_interface).