Clay Kaczmarek

"Why do we have these gifts, these abilities? Because it's in our blood! [...] The seeds were planted as two worlds became one. Behold the Assassins, the children of two worlds!"

- Subject 16.

Clay Kaczmarek (1982 - 2012), more commonly known as Subject 16, was an individual who had been kidnapped by Abstergo Industries and forced to relive his ancestors' memories in the Animus. A descendant of Ezio Auditore da Firenze, he was born into the Assassin bloodline.

After his alleged suicide, Clay continued to exist as an AI recreation of his personality within the Animus. As such, he was able to manipulate much of the Animus' programing from within to aid another Animus subject, Desmond Miles.

While at Abstergo, Clay relived the lives of his ancestors in the Far East and ancient Africa, as well as one at the Battle of Gettysburg, one in the Roman forum, and one who was connected with Queen Isabella.

Life at Abstergo
Clay was captured by the Templar-backed organization Abstergo Industries for use in the genetic memory recall program. Held within the Abstergo laboratory at all times by Dr. Warren Vidic, Clay was kept connected to the Animus for dangerously long periods, sometimes even days at a time. This led to him suffering from a severe condition known as the "Bleeding effect."

Through this Bleeding effect, Clay began to explore the memories of his ancestors without the use of the Animus; but his inability to control these visions forced him into a downward spiral of insanity, eventually culminating in his evident suicide.

Before this event, Clay was forced to explore the memories of his ancestor Ezio Auditore, who the Templars knew had located the Vault during his lifetime. However, he was never able to relive the desired memory. By draining his body of blood to paint several cryptic messages upon the floor and walls of the rooms he was being kept in, Clay killed himself to prevent the Templars from reaching their goals.

Legacy
Following Clay's death, the Templars were left without the location of the Vault; though they had gained the knowledge that another Assassin – Altaïr Ibn-La'Ahad – had once held a certain Piece of Eden that could help them find it. Thus, Abstergo kidnapped a descendant of Altaïr, Desmond Miles, who they labelled Subject 17.

Abstergo
During his incarceration, Desmond spoke often with Dr. Vidic's assistant Lucy Stillman about many things, including his predecessor, Clay Kaczmarek. Lucy, however, was often uncomfortable with speaking about him, as she blamed herself for his death. Indeed, she never even referred to him by name, usually only calling him "Sixteen."

By accessing private e-mails between Animus sessions, Desmond also discovered an email Lucy had written to Dr. Vidic, which detailed the Bleeding effect, and explained how it was connected to Clay. She expressed her concern in pushing the Animus subjects too hard; however, the email was never replied to, and was evidently deleted shortly after it was received.

The Hideout
Following Desmond's escape from Abstergo and the beginning of his journey through the memories of Ezio, the Assassins learned that Clay had managed to hack the Abstergo Animus before his death, and had placed twenty Glyphs throughout the Animus' rendering of the memories. These encrypted files, which had been saved onto the Abstergo Animus' memory core that Lucy had stolen, were later unknowingly transferred onto Rebecca Crane's Animus 2.0.

After decrypting all twenty files, the Assassins were rewarded with a genetic memory marked "date classified BCE." The video showed two free-runners (who referred to each other as Adam and Eve) climbing a large glass structure, with an Apple of Eden in hand.

Monteriggioni
Within each Glyph, Clay also left a set of coordinates, which corresponded with locations in Renaissance Rome. Upon visiting these indicated landmarks, Desmond discovered several Rifts in the Animus programming.

Within each, Desmond solved one of ten Cluster puzzles, and unlocked a piece of a file. Upon compiling them, they revealed a distorted video with the message "The miracle is in the execution," suggesting that (unlike the video hidden in the Glyphs) the Rifts instead concealed an executable file.

Upon accessing it, Desmond found himself in an unknown area within the Animus, and was able to run through a somewhat long virtual maze, similar to those within the Animus Virtual Training Program.

At the end of the maze, he found a hologram (partially broken and made of computing code) of Clay, who told Desmond that all hope was lost, and that he needed to go to Eden to find a woman named Eve. Before vanishing, Clay told Desmond to find him in the darkness.

This proved to be the first indication of Clay's AI presence in the Animus. Though physically dead, his "essence" had been absorbed into the system, allowing him to interact with the users, and act as a third person spectator; effectively letting him see everything that went on inside the Animus.

Black Room
Soon after he had fallen into a coma and was returned to the Animus to support his mental state, Desmond woke to meet Clay in the Black Room, a safe mode of the Animus' software. Here, Clay explained where they were, and offered advice on how to escape it.

Clay spoke to Desmond about the creation of the Synch Nexus, as well as promised him that he would help prevent the Animus from noticing him "wandering" into the outside partitions of memory.

At one point, as Desmond worked to return to his body, Clay asked him if he could come with him, perhaps until he could have a body of his own. As Desmond hesitantly declined, Clay admitted that he was not surprised, and that perhaps he had wasted his only chance.

Desmond completed the nexus just as the Animus began to attempt to rectify the intrusions he had been causing in other memories. As it began to delete the Black Room and all its contents, Clay grabbed onto Desmond and threw him out of the room, saving his life and (again) forfeiting his own.

Personality
Clay was a sarcastic and witty man, usually speaking of his rather dire situation with cynical humor. In the initial stages of the Bleeding effect, he proved to be driven, and sacrificed even his own life to make the Truth known.

Despite his own situation, as well as his occasional lapses of depression of his lost chances, Clay willingly helped Desmond regain his body and repair his subconscious.

Trivia

 * In the Assassin's Creed - French Graphic Novel, Subject 16 is shown to be alive, and is referred to as "Michael." However, the graphic novel is not considered canon in this respect, as it directly contradicts the events of the games.
 * The achievement in Assassin's Creed: Brotherhood entitled ".. .- -- .- .-.. .. ...- ." (Morse code for "I AM ALIVE") is earned by solving all Cluster puzzles. The achievement badge consists of the Morse code ". -....", which means "16".