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Metal- This resource is required to build structures, technology and ships. You will go through huge amounts of metal to build even the smallest ship. You can upgrade your metal mines and store any extra with a metal storage facility. You can never have enough metal so your mine production capabilities should be expand through upgrades as soon as possible.
Crystal - Crystal is used to build electronic components and you will need it in smaller amounts for ship building and upgrades. Some technology upgrades will require more crystal but metals should still be your top priority. You will need more energy capabilities to produce crystal in quantity.
Deuterium - This substance is the fuel for your spaceships. Planets that are far away from the sun will have more of this resource. The resource is also used for some research but in smaller quantities. Once you develop larger fleets you will need more of it.
Energy - Your structures won’t work properly without power. You have two types of power, solar and fusion. You can build solar plants on you planet and a solar satellite in space. Any satellites in space are very venerable to attack without adequate protection so new players are encouraged not to produce them at first. Fusion plants produce more power but are more expensive and will use deuterium as a fuel to operate.
Dark Matter - This resource is one you cannot produce and it must be purchased. With dark matter you can have access to advanced features like commanders and trade with NPCs. You can use PayPal, credit cards and other payment options to get dark matter. You are not required to buy dark matter and you can still play the game without it.