Yablans produced films which included Halloween (1978), Tourist Trap (1979), Roller Boogie, Nocturna: Granddaughter of Dracula, Halloween II (1981), Hell Night, Halloween III: Season of the Witch, and Tank (1984). Since his resignation from Compass International, Yablans produced films with Charles Band such as Prison (1988).
When Yablans was younger he realized he wanted to work in the movie industry after looking in a drive-in movie theater’s trash and finding pieces of cut out scenes.
Halloween began as an idea suggested by Yablans (entitled The Babysitter Murders), who envisioned a film about babysitters being menaced by a stalker. Carpenter took the idea, and another suggestion from Yablans which was that it take place during Halloween, and developed them into a story. Along with noted film producer and financier Moustapha Akkad, Yablans put forward $300,000 for the film's production, filming in Pasadena, California over the course of 20 days. Released in late October 1978, the film was an unprecedented success, making $70 million in its initial theatrical run. It became the highest grossing independent film of all time until it was surpassed by The Blair Witch Project, released twenty years later. Yablans and Akkad remained as executive producers after the film's sequel rights were sold to Dino De Laurentiis, the latter producing every entry in the series until his death in 2005. Yablans and Akkad, along with producer Joseph Wolf, founded the independent production and distribution studio Compass International Pictures (later Trancas International Films Ltd.)