[3] He described Pulp Fiction's influence on him: After Tse graduated from college,[2] he moved to Los Angeles in December 1998 to pursue a writing career.

[1] After three years of small jobs, Tse sold to television-based Showtime a script called 87 Fleer, about four middle-class kids from the Richmond District.

By the following September, the outline was developed into a full script that eventually became the Showtime television movie Sucker Free City (2004), directed by Spike Lee.

[1] He was also attached as screenwriter to adapt the following films that went unproduced: the 1951 science-fiction short-story collection The Illustrated Man and the 2005 American thriller novel The Winter of Frankie Machine.

[11] After Watchmen, Tse was attached to adapt the following films that went unproduced: 1961 children's book The Phantom Tollbooth and the 2005 science fiction novel The Traveler.

[13] Toward the end of 2013, Tse was hired by Columbia Pictures to write the script for a film adaptation of the racing video game series Gran Turismo.

[14] Tse optioned in 2014 the rights to the 2010 graphic novel Tribes: The Dog Years by Michael Geszel and Peter Spinetta with an interest in writing and producing a film adaptation.

[16] Later in the year, Sony Pictures bought the rights to Super Fly to remake the film based on a script by Tse.

[18] In April 2018, Alex Tse was writing the screenplay for The Last Masters, a martial arts action thriller that is a US-China co-production between Global Road Entertainment and Tang Media Partners.