The ZOD Engine description:
ZOD Engine, the missions of the single player campaign, despite the lack of bots to play against other players over the internet in different scenarios and allows you to enjoy the classic Bitmap Brothers game Z against open-source game.
A match to get started, simply (color, you want to play the map, competitors number, name, etc.) by filling in all the fields you have to configure the launcher. and once you are ready, just start the game.
Add the name of maps at your disposal, the games can be found in the installation folder in a text file. Plus, download youto play against your friends or against the AI with a level editor that allows you to create your own levels you will find.
ZOD Engine with the same graphics as the classic Z just has a higher resolution. So, basically, (snakes slithering along the ground, eagles flying, etc.) one that is open has great graphics with attention to detail.