Skullgirls takes place in the Canopy Kingdom, inspired by 1940s America, in which corruption and conflict runs rampant. On Nintendo Switch, the game is published by Skybound Games. In Japan, the game is published by Arc System Works. At its release, Skullgirls was developed by Reverge Labs, but the team that created the game split off from the company to form Lab Zero. Since its initial release in 2012, it has received two free extensions, Skullgirls Encore and Skullgirls 2nd Encore and while its roster initially consisted of an all-female cast of 8 characters, 6 more characters were added, 5 being developed thanks to the game's Indiegogo crowdfunding campaign, including 2 male characters. Skullgirls is a fighting game developed by Lab Zero and primarily published by Marvelous and Autumn Games.