Fnaf2, short for "Five Nights at Freddy's," is a survival horror video game that improves upon its predecessor by expanding upon its gameplay principles and adding new features. Take a look at the game mechanics in detail:
Animated robots fnaf 2 game:

Animated characters from the past and present are both present and returning in this game. Toy Chica, Toy Bonnie, Toy Freddy, Mangle, and the Puppet are the newest arrivals. New obstacles and behaviors are introduced by these characters, which players will have to adapt to. Foxy and Bonnie, two returning characters, both offer depth and nostalgia to the game.
An essential part of the game is the camera system, which lets players see the animatronics' activities through different camera feeds. Players can't plan their moves or anticipate the whereabouts of their animatronic characters without this technology, which keeps track of their locations in real time. To stay one step ahead of the game, players need to keep an eye on the various cameras placed about the pizzeria.
The Freddy Fazbear mask is a new mechanic that is introduced in this version. Put on the mask, and the animatronics will think you're one of them whenever they get too near. Putting on the mask in the blink of an eye when an animatronic is in the area adds a strategic element to the gameplay. The game ends if you don't put on the mask at the exact moment, therefore timing and reflexes are key.