The X-Files: Resist or Serve is a 2004 survival horror game developed by Black Ops Entertainment and published by Vivendi Universal Games for the PlayStation 2 video game console. It is based on the television series The X-Files (1993–2002), and is the third game based on the series, after The X-Files: Unrestricted Access (1997) and The X-Files Game (1998). The game is set during the seventh season of the television series, and the story is presented as three new "episodes" in which FBI Special Agents Fox Mulder and Dana Scully investigate mysterious deaths in Colorado, where they learn about an alien artifact used to resurrect deceased people. The agents' investigation ultimately leads them to Tunguska, Russia, where they discover a spaceship that crashed there nearly 100 years earlier.