Humanity is at a turning point. Infinite energy crystals have been found on another planet and you have to fight to take control of it. Unlock weapons and maps as you progress to expand the game as you play. Use the map editor to create your own levels!
In the third part you will find 30 new missions, lots of new guns and ALL weapons and missions from previous parts. Also, now you can choose equipment for each mission. And do not forget to check option, which makes all guns available for any mission.