The game is a 3D fighting game in which one to two players battle using teams of three characters.[1][2] The title character Saitama is invulnerable to other characters' attacks, and can defeat them in a single punch, but if a player picks him for their team, he will arrive late to the battle; as such, that player needs to make it through the match with the other two characters in their team until Saitama arrives.[3] An alternative version of Saitama without these attributes, called the "Dream Version", is also playable.[4]
The game received mixed reviews from critics,[7][8] but was nominated for The Game Awards 2020 in the best fighting game category.[12] While the story mode was praised, the gameplay and visuals were considered unpolished and too simplistic. Reviewers were polarized on the gimmick revolving around Saitama's invincibility, with some praising it for its uniqueness, and others considering it a fatally flawed concept rendering all other characters useless and making multiplayer mode completely unbalanced unless both players picked Saitama.[13][14][15]
The physical PlayStation 4 game was the 18th highest selling physical video game in Japan during its debut week, with an estimated 4,500 copies sold;[16] by its second week on sale, it no longer charted on Famitsu's weekly top 30 sales chart.[17]