External dependencies

    zlib

        Massively Spiffy Yet Delicately Unobtrusive Compression Library

    libpng

        Portable Network Graphics reference library which supports almost all PNG features

    ogg-vorbis ( libogg, libvorbis, vorbis-tools )

        completely open, patent-free audio encoding and streaming technology

    tinyxml2

        simple, small, C++ XML parser that can be easily integrated into other programs

    allegro 5 or allegro 4

        cross-platform library for video game and multimedia programming