Feature films
His debut feature film, Children of Invention, premiered at the 2009 Sundance Film Festival, screened at over 50 film festivals, won 17 festival awards including eight Grand Jury or Best Narrative Feature prize including "Best Narrative Feature" at the Newport International Film Festival, the Independent Film Festival Boston, the Los Angeles Asian Pacific Film Festival (where the cast won a Special Jury Prize in New Talent to Watch in Acting), the San Diego Asian Film Festival, and the San Francisco Asian American Film Festival, as well as "Emerging Filmmaker Awards" from the Hawaii International Film Festival and the DC Asian Pacific American Film Festival. The film was also released theatrically in eight cities, on DVD, and on VOD in 2010.
The film was also praised by critics, with Manohla Dargis of The New York Times saying that the film was a "fine feature debut...while the politics are there, you might be too busy choking back tears to notice" and the Los Angeles Times also called it "wonderful...absorbing, deftly played", Variety called it "urgent, artful...austerely poetic" and USA Today's Claudia Puig said, "I loved this movie. I can't remember when I have loved a movie quite as much as this one."
In 2012, Chun wrapped principal photography on Cold Comes the Night (formerly "Eye of Winter"), which he co-wrote with Oz Perkins and Nick Simon. The film stars Bryan Cranston (Breaking Bad), Alice Eve (Star Trek Into Darkness), Logan Marshall-Green (Prometheus), Ursula Parker, and Leo Fitzpatrick. Frequent producer and collaborator Mynette Louie produced the film.
In October 2025, it was reported that Chun had completed a first draft of the screenplay for the live-action film adaptation of Sleeping Dogs.