It is a weapons-based fighter involving crabs in the real world, with the player's goal being that of flipping their opponents onto their backs to deliver a finishing blow.

[2] There are 23 different species of crustacean as well as 48 weapons and a variety of game modes as the player's giant-sized crab battles against rivals.

Onuki has stated that the game was inspired by Dark Souls.

Fight Crab received "mixed or average" critical reviews according to aggregator Metacritic.

A sequel, Fight Crab 2, was released as early access on Steam in February 2024.