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Friday Night Funkin' is a web rhythm game developed by four Newgrounds users (two artists, Phantom Arcade and evilsk8r, one Developed by a team consisting of programmer ninja_muffin99 and composer kawaisprite.

In the game, players must control the protagonist "BOYFRIEND" (BF for short) to win the rap competition by imitating the opponent's rhythm and hitting the direction keys, and repel various challengers in order to compete with the favorite "GIRLFRIEND" (referred to as GF) dating. Friday Night Funkin' is a donationware and free and open source software rhythm game developed by a group of four Newgrounds users.