Amaltheia is a cross-platform game programming API that supports two backends, OpenGL and DirectX. The aim of the Amaltheia project is to create an intuitive and simple to use library, providing core 3d and 2d functionality in a platform independent manner. It also provides platform independence regarding basic network functions, input handling, threads and sound. Currently the GNU/Linux and the Windows OSes are supported.

Amaltheia library has the advantage of using the native graphics system (DirectX under Windows, OpenGL under Linux), thus achieving maximum performance. Developers using Amaltheia dont need to take care of the underlying details (be it Win32 or Linux). Amaltheia hides the differences through its API. The developer writes a unique code for the games/application that compiles and executes in both OSes.