Thrillkill(1984)

... Where The Game Plays You!

Thrillkill is a crime thriller about Karlie Kendall, a video game designer who moonlights as a hacker, stealing millions from bank accounts with plans to disappear to Brazil. Her secret partner Adrienne has other ideas—she wants the money for herself. Worse, Karlie's boss Julien discovers her scheme and hires criminals to track down the fortune. When Karlie turns up dead, everyone realizes too late that she's hidden the five million dollars inside her own game, Thrillkill, leaving only a cryptic clue for her sister Bobbie, a stewardess. Now multiple factions race to crack the code and claim the prize buried in the game's source code.