Obelisk of Light

The Obelisk of Light was Nod's strongest ground based defense during the First and Second Tiberium Wars. During the First Tiberium War it was often referred to as Obelisk Guard Tower.

History
Nod needed a powerful defensive mechanism to defend its bases, and so, its scientists created the Obelisk of Light. However, though it was a powerful weapon, its lack of armor was a severe handicap for Nod forces during First Tiberium War, which meant that it could be destroyed by an Ion Cannon strike or even a group of Orca Fighters rather easily. During the interim betwen the First and Second Tiberium War, Nod engineers went back to work on the problem. They were able to develop a second version of the Obelisk, which was much more resilient to enemy fire, especially enemy machine gun fire. Unfortunately, though they were able to increase its power to match advances in technology between the wars, they were forced to sacrifice firing speed for this enhancement.

The exact mechanisms behind the workings of the Obelisk of Light are unavailable. However, it is known that it uses powerful capacitors located below the structure to amass energy and then, using advanced optics and focusing systems, release it in a given direction.

Due to the lack of efficient power generation of the average Nod base, the Obelisk module was limited to a large stationary base defence building. The Obelisk was therefore cumbersome and never very portable, unlike other weapons in Nod's possession. The Obelisk also could not fire upwards towards the sky, due to problems with focusing the power caused by the construction of the crystal. It was accepted as an acceptable trade-off.

Low-power portable experimental Obelisk modules were developed and manufactured in limited numbers in the closing stages of the First Tiberium War, issued only to the Black Hand elite soldiers, and even then, not very commonplace.

Cabal seemed to have overcome both these limitations: The former he evidently solved because of the portability of the Core Defender, and the latter, because of the Obelisk of Darkness.

During the Third Tiberium War Nod themselves finally managed to conquer this task, equipping their mighty Avatar mechs with portable versions of the Obelisk laser.

First Tiberium War
During this period, the Obelisk of light was a sloped back obelisk that ended in a large focusing crystal that projected the laser. It was under complete computer control, with humans only needed to oversee that it worked properly.

The red laser beam it produced was extremely focused, and powerful enough to reduce a human target or light vehicle, such as a Humvee, to ash instantly, and do serious damage to heavier vehicles. Furthermore, its long range allowed it to engage enemy targets before they could retaliate; an Obelisk of Light had longer range than any GDI unit.

Obelisks were always a prominant part of Nod bases, especially around important Nod structures. For example, the bases defending Sarajavo featured nearly a half dozen of these powerful base defenses, including one that was specifically assigned to defend the Temple of Nod itself.

Second Tiberium War
During the Second Tiberium War, the Obelisk had a much different, flatter base, with a light bar that oscillated back and forth when the Obelisk was operational, but stayed fixed when the Obelisk was not operational. It is believed that this was a terror tactic towards enemy forces, as well as a way to quickly inform Nod forces if the Obelisk was charged or not. From the rear of the base, a Obelisk like tower, straight and capped with the firing crystal, stood. Like in the previous war, it was capable of releasing a red bolt upon an unsuspecting target.

Firestorm Crisis
With the Tacitus, CABAL created two variants, the Obelisk of Darkness, and the CABAL Obelisk.

Third Tiberium War
With the coming of the Third Tiberium War, the Obelisk has been greatly improved. The Obelisk, although taking much longer to charge, is much more powerful than before. Also, its weakness against infantry has been eliminated almost entirely. This is due to the fact that the Obelisk, when facing infantry, uses sweeping low power laser beams to vaporize infantry. The new threats that Obelisks now face are the new GDI aerial assault vehicles, such as the Firehawk. In addition, the Obelisk still requires a tremendous amount of power, and the destruction of power plants will render it as well as most of the base useless.