One Punch Man: A Hero Nobody Knows is a fighting game based on the mega-popular One-Punch Man series, developed by Spike Chunsoft and published by Bandai Namco. It is slated for release on Playstation 4, Xbox One, and PC in 2020.
The game is a three-dimensional 3-vs-3 tag team fighting game with the cast of the anime series's first season, but with one important distinction: if Saitama is selected as a member of the player's team, he will not be immediately usable in the fight, because he's running late to the fight. A timer is put in place that counts down the time remaining until Saitama arrives, with perfect guards and combo attacks shortening the time needed until he can be used. Once Saitama arrives, he can One-Hit KO his opponents.
The game's story mode follows the events of the anime through the perspective of a player-created character who was saved by Saitama in a chance encounter and, inspired by him, starts the journey to becoming a hero.
- Terrible Tornado
- Hellish Blizzard
- Silver Fang
- Atomic Samurai
- Mumen Rider
- Speed-o'-Sound Sonic
- Tanktop Master
- Metal Bat
- Metal Knight
- Child Emperor
- Spring Mustachio
- Handsomely Masked Sweet Mask
- Puri-Puri Prisoner
- Biting Snake-Fist Sneck
- Vaccine Man
- Mosquito Girl
- Carnage Kabuto
- Deep Sea King
- Big Damn Heroes: Enforced with Saitama: he can't be used at the beginning of the fight, and is meant to arrive when the player is struggling to hold out against an opponent.
- Brought Down to Badass: There's also a "Dream Version" of Saitama who wears pajamas and has his powers diminished so he can fight fairly.
- Character Customization: Not dissimilar to Jump Force and Dragon Ball Xenoverse, players create their own characters that serve as the central protagonists of the game's story mode.
- Gameplay and Story Integration: It's how Saitama is able to be both as canonically broken as he should be, and balanced with everyone else. Normal Saitama is his canon, god-tier self. That said, there's a Dream version that balances him with the rest of the cast, but justifies it as being All Just a Dream if you win with him.
- Non-Lethal K.O.: If Saitama runs out of health (almost always against another Saitama), he will announce that he has to go to the store and leave.
- One-Hit KO: Unless it's a Mirror Match against another Saitama, Saitama knocks out any opponent with a single punch.
- Purposefully Overpowered: Saitama is just as hideously broken as you'd expect. This is balanced out by him being unavailable for the first 270 seconds of the fight.
- Unstoppable Force Meets Immovable Object: It's possible to get a fight between two Saitamas. If this happens, they're technically able to damage each other, but remain Immune to Flinching, and if one's life meter is reduced to zero they suddenly realize that Bargain Day at the local supermarket is almost over and take their leave.