The evolution of FNF mods FNF mods, short for mods of the video game Friday Night Funkin', are user-created modifications that add new songs, characters, features, and stories to the original game, which involves a rhythmic music battle where the player must match arrow inputs to keep up with their opponent. These mods provide a way for the community to expand the Friday Night Funkin' experience beyond the base game, often introducing complex storylines, to the original challenging game,