Agents are genetically modified superhumans created by the Agency, using the disgraced work of Dr. Balthazar Czernenko. They serve as the main playable characters in the Crackdown game trilogy.
With their strained Peacekeeper ranks, the Agents serve as the Agency's main response and strike force, hitting back at the criminal gangs that have been plaguing Pacific City, since its founding.
In Crackdown, there are eight playable Agents in total, plus an extra four if you have downloaded the Four-Play pack DLC. However, the exact number of the Agency's Agents in service is presumed to be much higher.
In Crackdown 2, there are only four Agents to choose from, but a variety of suit colors to select (16 in single-player with all DLC, 20 in multiplayer with all DLC).
Being the best of what the Agency has to offer, Agents enjoy the Agency's best high-tech equipment at hand in their fight against crime in Pacific City. Augmented and superior to their human counterparts, Agents are superhuman in nature, possessing superior strength, agility, and higher reflexes.
However, while the forceful entrance of an Agent means the same as a four-man squad of Peacekeepers, they're still susceptible to heavy resistance. Another key feature is their ability to 'evolve'. Each one is given a set of specialized augments that improve the Agent's performance from field experience.
These 'skills' are the measurements, employed by the Director to monitor their progress, during their fight to uphold the law. Skills are improved through the method employed. If an agent kills an enemy with a firearm, then the criminal will drop small orbs that accumulate into them, adding to the Firearm skill. Once an Agent reaches a certain threshold of skill, then that will 'evolve' into the next level, making them more effective with it, as such, a Firearm Skill evolution will allow the Agent to reload their weapon faster and become more accurate.
To protect themselves while out in the field, Agents use a special bio-armor, crafted to evolve with the Agent does, changing their appearance as they improve their five core skills. Becoming more prominent and visual as the Agent grows the five skills.
In the Pacific City Archives mini-series released prior to Crackdown 2's release, it is revealed in Episode 2: "Evil Seed" that the original Agents from Crackdown were infected with a deadly virus caused by Catalina Thorne, which grossly mutated the Agent clones. This resulted in the destruction of the Agency's cloning labs, setting The Agency's cloning technology back many years, effectively to "square one".
Crackdown 2 sees the creation of a new type of Agent. These new Agents are now protected by a more advanced suite, which evolves along with the Agent, providing the Agent with heightened body protection and full facial protection. These new Agents also gain new abilities once they reach the peak of their Skills. With Level 5 Agents acquiring Wingsuits, Barge, and Ground Pound attacks as a result of their efforts.
Agents return in Crackdown 3, this time with more distinctive personalities and backgrounds. These agents also have their own different skill XP boosts. For the first time in the series, Crackdown 3 introduces female agent skins as well as existing male skins. Some of these agents are unlocked, and have to be found by collecting Agent DNA - each Agent DNA that is collected will reward the player with a new agent with different XP boosts.