For anyone confused by this achievement, it is earned not by winning a single match but by winning a game. I tried setting the game to play to 1 but that didn’t trigger. Seems like you have to play more then one match winning both matches and making sure no one else gets any points. I did it by playing with 4 controllers, on sushi level, play to 6. Run around and kill the other 3 characters. Then on the next match repeat and the achievement will pop. Probably could have been done with play to 2 and only two controllers. Hope this helps.