https://gulix.itch.io/gangs-of-mutants-of-new-york

Gangs of Mutants of New York is a one-page tabletop RPG in which you'll portray mutants animals. Like a Sheriff Squirrel. No, you can't play a Ninja Turtle. The tables don't allow for this option.

A free one-page supplement is present with the full game, allowing for new rules and two new types of characters : Dirty and Weird.