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ZERO Online is a sci-fi online game developed and published by TQ Digital Entertainment.
In the world of ZERO Online , the players no more play as warriors or mages in a desolate land but the pilots who master high-tech weapons, fighting in the immense universe. Shuttling between the numerous galaxies, the units of various forms and functions are navigated by the pilots to fight against ferocious alien enemies. It is an epic war: battling for the Earth Alliance is the pilots' ultimate honor and eternal duty.

1. Mech-Warrior

ZERO Online offers various units of incredible power for the players to pilot. To survive under varying battle conditions, these units are classified into two types: Melee and Range.

Melee units use hand to hand weaponry such as swords and scythes. Yet due to their high-tech rebuilding, these weapons can deal extraordinary damage to the enemies. The Ion Vibrating Blade, the Impulse Sword, and the energy Spear are just a few of the futuristic weapons providing the ultimate potency for these Melee pilots. While some of the more advanced melee weapons are made of photon power which combines the sheer force of these weapons with futuristic know-how; making them visually dynamic and incredibly powerful.

Range units excel at long-distance attacks, and the super guns are their favorite weapons. Equipped with different types of weapons, they can exert critical attacks of different attributes. The Flame Guns can eject high-temperature flames; the Frost Guns freeze the targets instantly; the Shotguns can frighten off the enemies; and the Machine Guns inflict instantaneous, multiple damage on the enemies. In addition, the unique multi-weapon system allows for simultaneous and varied attacks. The advanced range weapons have also incorporated the use of photon energy.
Both types of units can perform upgrades by accumulating EXP which is increased through battle. After each upgrade, not only will the performance of the unit become more reliable but the appearance will become more elaborate.

2. Funnel System

In ZERO Online, the funnel system was created to meet the players' expectation of multi units!

The funnel system is a unique feature, which allows a pilot to operate 3 units at the same time. When the main unit reaches level 100, the player can get the second funnel and the third at level 145.

You can easily rotate between the three units. When one is set as the main unit, the other two will become funnels to provide greater support.

Once the main unit is destroyed, one of the funnels will immediately take it's place. This system strengthens the security of your unit. The funnels also have unique resistance to flame and frost damage. By smart shifting through your units you can drastically reduce the overall damage to any one particular unit. In addition, the funnel's energy will be transferred to the main unit to enhance its potency.

3. Core System

The core system is one of Zero Online's unique features. There are 10 core types in the game. Each type has an exclusive core program and features different functions. For example; one can increase the enemy's damage, while another may possess the ability to detect others. When a core is equipped, the core-program will be loaded to the main unit.

Besides the core programs, each core owns up to 4 auxiliary programs. Each program endows the unit with a special function: declining a marriage proposal, shifting damage, upgrading the control-level of your weapons, and even forbidding other units' to jump, etc. The wide variety of programs and their additional features makes game play varied.
Some special programs allow you to establish an energy field across the entire map. This will cause your EXP or HP to suddenly increase. On the contrary, a weakening field also can be established, which makes the enemy unit unrepairable or its max HP decrease.

The core-combination system will help to decide which core program is best suited to you. But if the core-programs of two cores are the same can they be combined to one core. A maximum of 4 auxiliary programs can be transplanted into a new core.

By intelligently utilizing the various cores, you can customize your unit to suit your taste.

4. Transformation System

Both melee or ranged units can transform into various units ranging from a powerful gunnery chief to a roaring dinosaur. You can transform your unit as you see fit. Each transformation not only changes your shape, but can reinforce your strength, provide a wider attack range or a faster attack speed, etc. The transformation process is fully explained during game play.

5. Equipment Upgrade System

The multi-upgrade of equipment is also a feature in ZERO Online!

There are many mysterious gems in the world of ZERO Online which are classified into four types, dependant on their effects: Potency Gems, Exp Gems, Attack Gems and Defense Gems. The energy of these gems is unstable, so they can only be socketed into specific equipment. However, when fashioned properly, it will result in increased performance.

Meteors also have the ability to upgrade the level of your equipment and make it more ergonomically sound.
 

The Equipment Bonus System allows for limitless high-quality equipment upgrades. Additionally, the laser signature system imprints your name on your equipment so no one else can use it.

In Zero Online, there is a myriad of mysteries waiting for you to explore like the breathtaking spaceship missions which challenge your ability to command your units.

Zero Online is as vast and mysterious as the universe so what are you waiting for? Step into your MECH and unleash the havoc and fury that is inside every galactic adventurer.

Generations have passed since faith ruled man and man ruled machine. After the Universal War, religion seemed to simply disappear. Man turned to science to fill the void left by spirituality. In this new and sterile philosophy, skepticism is revered while belief is admonished. Survival of the fittest has left the realm of the physical to be overthrown completely by the intellectual. It was in this way that in this era, the most aporetic and rigorous minds have risen to power and man and machine exist in nearly complete symbiotic coexistence.

For generations now, Earthlings have spread the seeds of civilization to the corners of the galaxy, founding settlements on planets that could support life and robotic mining colonies on planets that could not. The humans searched for extraterrestrial life on the planets but finding none, continued to extend themselves into the far reaches of space. No one truly knows why, after nearly a century of unhindered expansion, an obstacle has suddenly arisen. Whether it was interference with the qubit encoded programming of the unmanned mining colonies, or anonymous alien interception still remains unclear. Through the agony and chaos of the recent upheaval, Earth and her interstellar progeny have only uncovered these seven letters: O-T-H-E-L-L-O.

The argument for alien interruption is wrought with as much skepticism as optimism. For decades humans have expanded throughout the farthest reaches of the galaxy and for centuries have probed galactic and intergalactic space. In the past millennium scientists have reassured the populous of the existence of extraterrestrial life over and over again; all theories, experiments and tests show that non-human intelligent life must exist somewhere out in the universe. The chance to make such a significant discovery, however unlikely, is bound to eventually happen. Nonetheless, the overwhelming reality is that human interstellar navigation is still in its infancy. So every time something unexplained happens on the rims of galactic civilization, there will always be those who attribute it to aliens. Othello falls into this theory as popularly as any other, that is to say, Othello is a computer hacking alien race.

Another popular theory is that Othello is simply the ghost in the machine, a form of artificial intelligence extant in the fecundity of silicon crystals of unknown chemistry and origin. This theory somewhat borders on the non-human intelligent life theory, except that the former is usually associated with carbon based life forms whilst the latter employs a silicon base. Proponents of this theory are mostly curious computer engineers and graduate students whose thoughts linger in the higher echelons of advanced experimental quantum theory.

There are, of course, a minority of conspiracy theorists who claim Othello to be a secret faction of the Earth Alliance Government, though no one takes these ideas too seriously. This minority of paranoid skeptics only slightly out number those who believe Othello is God, coming for vengeance on an arrogant race from where he was so recently expelled. These statistical outliers are largely ignored by the body politic and wholly ignored by mainstream media.

The most popular theory however is by far the most likely: Othello is the name of a guerrilla terrorist organization; a colony of forgotten space travelers lost on a distant rock. This theory is the result of the rational and scientific majority, whom still employ the wisdom of the ancients: ¡��All things being equal, the simplest solution tends to be the right one.¡�� Without any other proof of non-human interference it stands to reason that the problem is internal to the human race.

Whatever explanation you believe to be true, the fact remains that Othello is a liability that can not be underestimated. Since the first attacks on Earth Alliance outposts in the long arms of known galactic space, no one and no place can be said to be safe from attack. Objectively speaking, these occurrences of terror and destruction haven't been entirely detrimental for human existence. As the interstellar war increases in intensity so does interplanetary trade. The war has reinvigorated a population that has, in recent generations, begun to stagnate. The hopelessness and desperation of a race complacent in their automated and luxurious lives has found a cause to unite behind. The survival instincts buried beneath so many layers of hedonism has finally been awaken, as a result the war effort has also boosted technological development. Yet, with new technology, new materials are needed and in greater numbers. When Othello's minions attack and destroy a mining colony or manufacturing plant on some distant planet, the effect is felt all across the galaxy all the way down to Mother Earth. Othello has perturbed the human world on every level and in doing so has become the archetype of terror.

Othello's seemingly unfettered ability to reprogram once friendly and obedient robots and machines has created a superstition among the human race. Only machines that are not networked and incapable of full automation have not been dismantled. This has led to the reintroduction of battle mechs; powerful, fast and accurate as a machine, but with a human pilot there is no danger of Othello corrupting the machines circuits and turning the machine against mankind. Independent of the government, mechanized mercenaries have become rampant among the galaxy. With no official affiliations, they sometimes cooperate to battle Othello's minions, and sometimes fall at odds battling each other. As these space cowboys grow in number, famous heroes and infamous outlaws exhibit the very best and worst of human nature, attracting those unsatisfied with their bourgeois existence to seek the freedom and adventure of mercdom. Those motivated few, scrape together what money they can in order to purchase a basic walker unit; just enough to get them off-planet. In the free market interstellar economy, competition is fierce and in the big empty vacuum of space, only the laws of physics apply.