

Both of these aspects provided a sense of Television Series verisimilitude that many found to be appropriate to the game’s Trek origins. PD’s most popular aspects were a multi-tiered task resolution system, where characters could achieve 'Complete', 'Moderate', 'Minimal', or 'Botch' levels of success with their actions, and the Character Reputation and Background system that allowed characters to “spontaneously” develop skills, abilities, and prior associations appropriate to the mission at hand.

Olsen, it used a D6-style system similar to Shadowrun and Star Wars. Using an in-house design by Mark Costello and Timothy D. From Wiki he original release of Prime Directive was published by Task Force Games in 1993.
