Overcooked! All You Can Eat

Played this level with 2 controllers (both set to split controllers on the main screen therefore making 4 players). I then set 2 players to the turtle (one of each variant), one to the crocodile and one to the dinosaur. Used level 1-1 from Overcooked!2 as it's pretty easy. I got 3 stars in the level but would assume as long as you get 1 star it should unlock (as with other achievements of this type in this game).