The game was first announced in Chokaigi 2017 where the developers stated they would bring the franchise composed of fighting games to role-playing games. The first teaser was released in May 2018. Global version manager Ying Chen states that the developers aimed for players to make their own types of teams per preference. In regards to the timing between the original Eastern and Western versions, Chen said that the developers wanted Westerns to receive the same treatment. SNK wanted to create a mobile game offering fun of control. They focused on letting our players to enjoy multiple combination and powerful sense of hitting through simple moves. The cards were added in order to provide a sort of strategic feeling. It was developed be appealed by a wide range of players. In order to make the game stand within other mobile phone games, the team added multiplayer options, something rare in the market. SNK stated that Netmarble already had a large experience within mobile phone games worldwidely and wanted them to continue with this tradition. The translation from the fighting game system to a side-scrolling game was felt be well executed by the developers. The game was created with the
Unity engine with SNK wishing to create appealing graphics in the process. While the game offers the player the idea of buying different features, the company wanted to still give them freedom in regards to what they could do. The development team worked to make everything seem unique, that the basic attacks seem like signature moves. Writer Akihiko Ureshino stated SNK will not use characters from the
EX spin-off games from the
Game Boy Advance and instead
Maximum Impact characters from the
PlayStation 2 as the former were noted to be less popular than the latter.
All Star has added many guest characters in collaboration with other franchises, including SNK's
Samurai Shodown series;
Hideaki Sorachi's
Shueisha manga series
Gin Tama;
Bandai Namco's
Tekken and
Soulcalibur series; Netmarble's
Seven Knights game;
Nakaba Suzuki's
Kodansha manga series
The Seven Deadly Sins;
Koei Tecmo's
Dead or Alive series;
Arc System Works's
Guilty Gear series;
Capcom's
Street Fighter series;
Sega's
Virtua Fighter series; and several
WWE professional wrestlers. To promote the addition of
Samurai Shodown characters, Kyo was portrayed by
Yuichi Nakamura for a commercial alongside
Hiroshi Fujioka as Haohmaru. Nakamura reflects enjoying this work due to admiring his superiors, most notably Fujioka. Shin Hwa Cho from Netmarble expressed excitement in regards to the WWE collaboration as it would appeal to newcomers to the series. Brian Flinn from WWE shared similar feelings as it would popularize the wrestlers throughout the game. ==Reception==