[1] Their code names are based on the cards needed to form a royal flush in poker: Ace, King, Queen, Jack, and Ten.

The Royal Flush Gang also made appearances in the live-action Arrowverse TV shows Arrow in 2012[7] and The Flash in 2015 and 2021.

[8] The comic book versions seen in the 2013 Forever Evil storyline were redesigned to follow the pattern set by their Arrow appearance.

[9] The Royal Flush Gang first appeared in Justice League of America #43 in March 1966 under the leadership of Amos Fortune and were created by Gardner Fox and Mike Sekowsky.

[12][13] After Fortune abandoned the Gang, a new Ace became the leader and they attempted to steal four paintings containing clues to a hidden treasure, but were thwarted by Joker's manipulations.

[14] Most of them then abandoned their criminal careers, although Jack briefly joined the Secret Society of Super Villains as "Hi-Jack".

The second Royal Flush Gang was set up by Green Lantern villain Hector Hammond in Justice League of America #203.

In the post-Crisis DC Universe, there were multiple active, costumed members, some of whom derived their outfits and codenames from cards with pip values lower than ten.

Each member has a playing card value, and those who rise or fall in the Gang's esteem gain or lose a "pip".

[17] In Infinite Crisis #2 (2005), the Joker tortures and kills the leadership of a local Spades cell of the Royal Flush Gang from an unspecified city, after being rejected by the Society for his "instability".

[19] Another cell of the expanded version, this one stylized as a street gang, appear as members of the Society in Villains United and several of its tie-ins in other comics.

[22] Another incarnation of the Royal Flush Gang appears in the "Forever Evil" storyline as members of the Secret Society of Super Villains.

[28] In the 2022-23 limited series Punchline: The Gotham Game, the Royal Flush Gang, consisting of the King and Queen of Hearts (married couple Rex and Regina Quintain), Jack, Ten and Bluff (son of the King and Queen of Diamonds), are taken over by Punchline and help her to manufacture and distribute her drug XO in Gotham.