Headhammer is an electronic rock song which plays during Splatoon 3's battles (excluding Splatfests). It starts out with a guitar before adding on drums and then finally adding on vocals, firstly being male vocals which are then accompanied by high-pitched female vocals. At 1:20 the song is repeated.
The name is a play on "hammerhead", as in hammerhead sharks. It may also be referencing the act of headbanging, slang for nodding one's head violently to fast rock or metal music.
Headhammer (Splatoon 3 Enter the Splatlands Invitational 2022)
This version played on Splatoon 3 Enter the Splatlands Invitational 2022 during the waiting screens. It has a proper outro and it's played in mono audio.