One-Punch Man Wiki

Game-Berus (ガメベロス, Gameberosu; Viz: GameBeros) was a Mysterious Being who attacked the first Hero Costume Contest. It was killed by Saitama.[1]


Game-Berus was a giant sentient turtle-like creature who had three heads and a shell, characterised by a muddy green-ish color. It could stand on its hind legs.


Game-Berus was originally a turtle. When its owner flushed it down the toilet, into the sewers, it transformed into a monster after bathing in sewage.


Not much is known about it, but it seemed determined to drown humans in sewer water.

Appearances in Other Media[]



Game-Berus interrupts a hero costume contest before Saitama can get a final verdict. After easily defeating B-Class and C-Class heroes, it declares that it will drown humans in sewer water. It is then defeated by a punch from Saitama after charging at the judges.

Power and Abilities[]

As a Demon-level threat, Game-Berus was quite powerful. A group of C and B-Class heroes were unable to do anything against it and the S-Class hero Genos even praised the monster after Saitama killed it, claiming Game-Berus wasn't weak.

Physical Abilities[]

Enhanced Durability: Game-Berus had a very tough shell and skin, as the B-Class hero Darkness Blade was not able to deal any damage to it.

Saitama stops Game-Berus

Enhanced Strength: Game-Berus had enough strength to effortlessly smack aside various C and B-Class heroes, including Darkness Blade whose armor was easily broken with a single hit.

Spherical Form: Game-Berus could roll into a ball to attack others with greater speed and power than his regular strikes.


  • His name is a portmanteau of the Japanese word for turtle (kame) and Cerberus, the three headed dog that guards the underworld in Greek mythology, and the classic Daiei movie monster "Gamera".


  1. One-Punch Man Omake; Sense


Mysterious Beings
Dragon (or higher) Boros Orochi *
Demon 170,000-Year-Old Cicada Larva 170,000-Year-Old Cicada Adult Armored GorillaAwakened Cockroach Baquma Beast King Bruinado Bug God Building Booper Deep Sea King Demonic Fan Devil Long Hair *Do-S *Eyesight Face Ripper Fist Fight Djinn Free Hugger G4 G5 Game-Berus Giant Crow Grizzly Nyah Hundred-Eyes Octopus Jumping Spider Macho Daikon Mosquito Girl Rafflesidon Rhino Wrestler Royal Ripper Scaledon Senior Centipede Showerhead Sky King Subterranean King Super Mouse Surprise-Attack Plum The Great Food Tub The Three Crows Unihorn Vampire (Pureblood) 
Wolf Himawari Hotdog Messenger of the Seafolk Piggy Bancon Tongue Stretcher
Less than Wolf
Unknown Alien Seer *Ancient King Angry Grandpa Autumn Phantom Red Golden-ringed Dragonfly *Benpatsu *Choze DarkDark Matter Gunner Eagle Enamel Evil Eggs Evil Eye Evil Natural Water *Falcon Fish of DarknessGale Giant Salamander Gigakigan Goddess Glasses Gyoffrey Hamukichi *Haragiri Hawk Hellfire Junior Centipede Kite Lord Great White ManakoMen's Esthetician Man *Platinum Sperm Rosie Raptora *RepteraSage Centipede Suppon Sword Devil Executioner Venus Mantrap Volten *