The centerfold and heart of the GDI base, the Construction Yard is essentially the Master Control to the foundation of your Structures, Defenses, and Offenses. The Construction Yard enables you to build other structures, and the higher the level, the more structures you are able to build. Additionally, the Construction Yard has its own storage space, and with each level, it enables you to hold a larger amount of Tiberium and Crystals. This structure must be defended well, for if it is destroyed, the entire base is destroyed with it, and the attacking forces will claim your territory and all resources you’ve collected.
The harvester is the main source of income for base and unit expansion. When placed on Tiberium or Crystals, the harvester will constantly collect these resources until your storage for them is full. With each level, the Harvester collects these resources faster and faster, and the bonus increases. Silos nearby also increase this bonus, so try to coordinate with those structures!
The Power Plant is the power source of your entire base. Unlike other Command & Conquer games, the power here functions differently. Over time, the Power Plant will generate more and more power, which is accumulated and used for purchasing buildings, defenses, and offensive units, while at the same time, it is used to repair and level up the ones that you already have. When placed next to a harvester or accumulator, the power plant gains an extra bonus, and when placed next to a refinery, the power plant boosts your cash flow!
The Refinery is the sole provider for your cash flow into your base. Over time, the Refinery collects actual cash (not Tiberium), which you can use for the purpose of researching new units and structures to either defend your base or oppose that of the enemy. If you want to advance your base beyond a few riflemen and trucks, you’ll definitely want to have a Refinery or two. As a bonus, if placed next to a power plant, the refinery will generate more revenue for your cause.
Probably the most simple yet most necessary structure in your base is the Silo. As you quickly destroy other bases and upgrade your harvesters, you’ll find that it is very easy to collect a significant amount of resources. With the constant flow of income, whether you are online or off-line, your silos will ensure that you have adequate storage for the large amount of Tiberium and Crystals you will collect as you progress. As a bonus, a silo placed next to a harvester will greatly increase that harvester’s output.
When you feel your power plants are not generating quickly enough, the accumulator is here to save the day. Accumulators provide a bonus to all power production, while at the same time, they maintain your power supply. Think of it as the batteries to your base, as you need to store the constant power that is generated by your power plants. Level these up, and you’ll see more power than you need in no time at all.
The Command Center is the force of your base. Build one of these, and you can start to expand your army, building any offensive units that you have researched thus far. The higher the level of your Command Center, the more you can strengthen your offense, allowing you to take on stronger enemies and reap more rewards. Investing money in this structure will boost your skill and effectiveness on the offensive battlefield.
You can’t have infantry without a barracks! And sure enough, this building will help you create an army of soldiers, big and small. Additionally, the higher level the barracks, the higher efficiency your repairing is, when it comes to repairing your ground infantry. Faster repairs with less resources used.
Similar to the Barracks, the War Factory enables the build of units, this time in the form of vehicles and tanks in your offensive line. Also, the more you upgrade the War Factory, the more efficient your vehicle repair is in your offensive line-up.
The airfield enables you to build the small assortment of aircraft in your offensive arsenal. While not necessary, bringing in an airfield will give you a new style of gameplay, allowing you to attack from the skies, flying over most of the enemy defenses. Additionally, the Airfield, when upgraded, becomes more efficient at repairing your air vehicles.
The Defense HQ is similar to the Command Center, except that it is in control of your Defenses, not your Offenses. The Defense HQ allows you to construct defensive structures and units, and it also is responsible for the repair of your defenses. With every upgrade, you can boost the level of your defenses to that of your Defense HQ, so the higher you level this structure, the stronger you can level up your defensive units.
Not to be confused with the Defense HQ, the Defense Facility has two jobs. The first one is boosting the efficiency of the repair of your defense (similar to the Barracks, War Factory, and Airfield), but the main importance of this structure is that it enables you to build support structures that defend your base and other alerted allies in the area. With the Defense Facility, you can build the Skystrike, Falcon, and Ion Cannon support structures, which are all listed below.
The Skystrike Support is a powerful anti-infantry defensive structure that is placed in your base for general defense. When constructed, any time your base (or a nearby allied base) is in an alerted status, the Skystrike Support will fire upon incoming enemy units, severely damaging infantry that happen to fall under the attack. The higher level this structure is, the stronger the weapon is. It is very important to upgrade this weapon to a higher level, because it doesn’t have a very strong effect on any infantry units that are a higher level than your support structure.
Note: Only ONE support structure can be built in any given base.
The Falcon support dispatches a team of firehawks to defend your base from air attacks, when alerted. Similar to the Skystrike Support, this structure will defend your base and any close bases that are alerted, and it will act as a powerful deterrent, in this case, against air units that are at a weaker level than your support structure. If you’re experiencing many air raids, you may want to invest in this defense.
Note: Only ONE support structure can be built in any given base.
Ion Cannon Support
The most expensive but most likely the strongest defensive structure you can own, the Ion Cannon Support is capable of delivering devastating damage to any vehicles that fall prey to its beam of light. When alerted, the Ion Cannon will aim in, and defend against vehicles and tanks that are attacking your base or that of your close allies. This is especially useful against the regular barrage of vehicles you will probably face on a regular basis in enemy territory. Keep in mind, if you use this, it is very important to upgrade it to a higher level than that of the attacking vehicles, or it will have little effect on the enemy.
Only ONE support structure can be built in any given base.