In particular, Chocolate Doom aims for: * Demo compatibility with DOS Doom 1.9 * Savegame compatibility with DOS Doom 1.9 * Bug compatibility with DOS Doom 1.9 (it should be subject to the same limits as Vanilla Doom) * Compatibility with DOS Doom 1.9 configuration files. A "Chocolate Setup" tool accompanies the port and can be used to configure it. The setup tool mimics the appearance of the original Doom setup program.