Along with the Narrator, Tyler founds Fight Club, which quickly evolves into the radical anti-consumerism movement known as Project Mayhem.
We are a generation of men raised by women, trained to know things inessential to our own survival.
Self improvement is masturbation, self destruction just might be the answer.
You are not a unique snowflake.
We are the all-singing, all-dancing crap of the world.
"The Things You Own End Up Owning You."
Tyler first appears in the film Fight Club in three flashes of one frame apiece, once while the narrator is running a copy machine, again when he tries to get medication for his constant insomnia and finally when he goes looking for Marla after their first meeting. He shows up in person as a soap salesman who accompanies the film's nameless narrator on a business trip flight. When the narrator returns home to see his apartment and, subsequently, all his possessions have been destroyed in a terrible fire, he contacts Tyler via payphone. The two meet at a local bar and talk over a few drinks. Tyler begins to speak about the obsession with consumerism in the country, and having had all his furniture burned, the narrator empathizes with Tyler's ideals, and becomes incredibly fascinated by him. When Tyler and the narrator leave the bar, Tyler offers him to stay at his house, in return for a small favor....
Tyler's request is just as strange as the character himself: he tells the narrator to hit him as hard as he can. After some understandable hesitation, the narrator gives in and punches Tyler in the ear. The punch leads to the two men engaging in an all-out brawl, but rather than ending spitefully, they realize they love the feeling, the primal rush of beating each other senselessly. Soon enough they draw a crowd, which eventually evolves into Fight Club, an underground group where men with repressed aggression vent their frustration with society by reducing each other to a bloody pulp. All the while, the narrator stays at Tyler's house, a dilapidated old mansion prone to leaks and utterly grotesque living conditions. Tyler's minimalist hunter-gatherer lifestyle seems tailor made for the house, and before long, Tyler's ideals are instilled into the narrator.
In Tyler we trusted.
The Narrator and Marla Singer Watching Project Mayhem's Latest Act
Even when the first two rules of your club are not to talk about it, more and more people begin showing up at Fight Club, and we see that Tyler has set up Fight Clubs all over the country, all seemingly unbeknownst to the narrator. As Fight Club's numbers grow, so do Tyler's extremist tendencies. Fight Club quickly evolves into a terrorist group titled Project Mayhem, whose primary intention is to destroy consumerism's death grip on American society by blowing up coffee shops and other symbols of yuppie culture. The group becomes more and more violent, eventually resulting in its first casualty in the form of Robert Paulson. Despite the narrator's best efforts to persuade them otherwise, the surviving members of Project Mayhem view Paulson's death as an act of martyrdom, and have been clearly brainwashed by Tyler, who is seen hammering home their message while the members toil away in a field.
"So we're...The same guy?!" Fight Club's climax has the narrator desperately trying to stop Tyler's ultimate plot to destroy every major credit card corporations' main office complex, a plot that if successful would wipe away all debt and cause utter chaos, setting everyone back at zero. In a bizarre twist, it is revealed that Tyler Durden and the narrator are the same person. The narrator invented Tyler as an alternate personality to do the things he could not. As Tyler says "I fuck like you wanna fuck, I talk like you wanna talk, I look the way you want to look...". In a desperate attempt to stop Tyler, the narrator shoots himself in the head, "killing" Tyler in the process. The narrator is unable to stop the bombs from going off in time, and him and the remaining members of Project Mayhem watch in awe as buildings fall before them. The narrator's fate is left unknown, as the movie ends shortly after.