Five Nights at Freddy's 4 is a game in the Five Nights at Freddy's series. It takes place at the location of the first game. There are the same animatronics as the first game (excluding Golden Freddy) and is the same, but the animatronics act different, and there are different Phone Calls. This game has a massive change in mechanics, as you now have free roam.
Phone Guy gets a partner security guard. The security guard walks in the halls and looks around the restaurant, while Phone Guy gives him his messages over the intercom in the restaurant. The security guard quits after the game, leaving just Phone Guy once again.