Firefly takes place in a space Western setting where high technology mixes with frontier life on newly terraformed planets.

In an interview with BoardGameGeekTV, line developer and lead writer Monica Valentinelli described the differences between the two licenses this way: In 2005, Margaret Weis Productions put out another game called the Serenity RPG.

So, what we did was went back to the drawing board, and our systems team developed a game based on Margaret's wish for this to be easy to play, but also give somewhat of a nod to our roots, without essentially shutting off everything that's been done in the last eight years.

Every die in the dice pool that rolls a natural 1 (called an 'Opportunity') not only doesn't count toward the total but also causes some form of negative consequence for the characters to overcome.

[5] Echoes of War collected four digital adventures for the Firefly RPG (two of which had previously appeared in the Gaming in the 'Verse preview edition) and published them together under a single cover.

[6] In its review of Echoes of War, the gaming site Reviews from R'lyeh noted that this title's inclusion of a basic set of rules for the Firefly RPG "means that Firefly Echoes of War: Thrillin' Heroics is a standalone book that can be run using just the rules it contains, or it can be run with access to either version of the rulebook.

Featured artists included Ben Mund, Beth Sobel, Jennifer Rodgers, Kurt Komoda, and Melissa Gay.

Things Don't Go Smooth introduces four new types of non-player characters for Firefly campaigns, and offers advice on how to handle Reaver encounters using the Cortex Plus system.

Firefly Role-Playing Game brand manager Monica Valintinelli described the Westlake as "a ghost ship from the Unification War—so there's this legendary battleship that's out there, somewhere, in the black—it's got all these rumors about it.

'Ghosts In the Black' gives you and your Crew the opportunity to conclude the Westlake saga, from a false glimmer that establishes its legend in your game, to the final revelation of its mysteries.

'[12]Robin Laws has said that he was approached about writing "a campaign of interlocking adventures" for the Firefly Role-Playing Game at Gen Con 2013, and that he accepted because his "wife would really love it" and "would gladly participate in that homework" if he had to watch all of the shows from the original series again.

[11] Although ICv2 initially reported that Ghosts In the Black would be released in April 2015,[13] the supplement wasn't officially announced on the Margaret Weis Productions, Ltd website until 5 May 2015.