The game is played by replicating the challenges various characters face within the fictional realm of Blue Moon.
"[5] The original 2004 base box of the game contains: The selection of individual characters available includes: In addition to the core pair of included decks are two supplementary decks, "Emissaries & Inquisitors: Allies" and "Emissaries & Inquisitors: Blessings".
The augmented rules integrated into the foundational set afford players an expanded spectrum of options for customizing their decks.
In addition, select promotional cards have been dispensed as tokens of appreciation upon reaching specific milestones at assorted gaming events.
[7] In Issue 51 of the French games magazine Backstab, Olivier Guillo thought that in a world awash with CCGs, "It is through subtle development of certain things that Blue Moon stands out from the others: first of all with a good quality basic box [...] and superb larger-than-standard-sized cards."
"[8] Writing in the Slovenian magazine Joker, David Tomšič noted that "Gameplay is fast-paced and consists of back-to-back fights that decide the winner of the battle."
Tomšič noted that the game had good replayability but commented "It's just a shame that when you buy several expansions, it becomes quite expensive.