What is Fnaf? I know it has a bear, fox, duck, and bunny. But I hear there are more. Is this a game or book series, or something, I don't know.

Fnaf is a video scary game by Scott cowthon. It's when you have to survive from 5/4 animatronic killer mascots by closing the doors and looking at the camera. Their are 6 games fnaf 1,2,3,4,world and sister location

If you don't know what FNaF is, God has blessed you.

fnaf is a series of horror games where you are a night guard trying to survive the night the animatronics wonder around and they think your a naked endo skeleton out of its costume so they jump scare you and you get a heart attack and they stuff you in a freddy suit the animatronics names are freddy, bonnie, chica, foxy, toy chica, toy bonnie, toy freddy, puppet, balloon boy, mangle, golden freddy, spring trap, phantom foxy, phantom freddy, phantom chica, phantom balloon boy, See More phantom puppet, nightmare freddy, nightmare bonnie, nightmare foxy, nightmare chica, nightmare, nightmare fred bear, baby, ballora, funtime foxy, funtime freddy, ennerd those are the characters and the first location was fred bears family dinner until it was shut down by the spring lock incident the next was fnaf two then fnaf 1 then 30 years later fnaf 3 opened but fnaf 4 was a nightmare after his brother shoved him in fred bears mouth killing him then sister location started and then you go throught the game learning more about the place you find out that baby is not really talking to you cuz in one point they say i am pretending but it is really ennard that is talking to you in the real ending ennard kill you and wears your skin to escape the place

Fnaf is a horror game series, with 4 main games and two spin of games, "Fnaf World" and "Five nights at Freddy's Sister Location". The spin offs have a different story then the main game.
Fnaf is a horror game where you play as a security guard trying to keep the animatronics (In order of your question Feeddy, Foxy, Chica, and Bonnie) from getting into the security office and stuffing you in a suit, thus killing you. There's a story behind the animatronics and the establishment, See More but I won't go into that. The other fnaf games are in a similar fashion, but with different locations and characters.
Sister location is different with a free roam element to it and a scripted story to it. It's a he of a lot scarier then the main series in my opinion. This game has voice acting and more intense segments of gameplay, with two endings.

I hope that helped! If you have any questions, please feel free to ask!

Beware of the NIGHTMARES! But basically it is a point and click indie horror game that you have to survive from 12 to 6 am. You check the cameras and the doors to see where those devils are and in 4, no cameras. Just you as a boy in a hospital and trying to survive from the Nightmares. But beware, in 4, there are MANY, and I mean ALOT of robots that can kill you, and you dont want to know.

Theres 6 games and the owner is Scott Cawthon, theres FnaF1, FnaF2, FnaF3, FnaF4, FnaF World and Sister Location. The animatronics name: FnaF 1: Freddy Fazbear, Bonnie, Chica, Foxy and Golden Freddy. FnaF2: Toy Freddy, Toy Bonnie, Toy Chica, Mangle, Ballon Boy, The Marrionet/Puppet, Withered Freddy, Withered Bonnie, Withered Chica, Withered Foxy, Withered Fredbear, Shadow SpringBonnie and Purple Fredbear. FnaF3: SpringTrap, Phantom Freddy Fazbear, Phantom Chica, Phantom Foxy, See More Phantom Ballon Boy, Phantom Mangle, Phantom The Puppet/Marrionet and Phantom Fredbear. FnaF4: Nightmare Freddy, Nightmare Bonnie, Nightmare Chica, Nightmare Foxy, Nightmare Fredbear, Nightmare, Plushtrap, Freddles, Jack-O' Bonnie, Jack-O' Chica, Nightmarrione, Nightmare Mangle and Nightmare Balloon Boy. FnaF World: Its everybody but cuter, theres some special animatronic: Purple Guy (the killer that brokes animatronics), Crying Child (When Purple Guy kills a child the children become a crying child and it scares Purple Guy.), Coffee Machine, Funtime Foxy/Toy Mangle (Fixed Mangle), Animdude (Probably Scott Cawthon.), Chipper Lumber and co. (Chipper come from an old game from Scott.) and Paperpals (In fnaf2 in a party room.). FnaF SL: Baby, Ballora, Funtime Foxy (its not Fixed Mangle), Funtime Freddy (He have a marrionet named BonBon), BonBon, Ennard, Bonnet (BonBon girl version), Yenndo, Lolbit and The Scooper (I guess). Now the nightguards. FnaF1: Mike Shdmits. FnaF2: Jeremy Flitzerald. FnaF3: Fritz Smith. FnaF4: Kenny (Your a child so your pretty much a night guard.). FnaF World: Adventure Freddy (Your not a night guard.). FnaF Sl: Mike Shdmit. Now more special characters in FnaF World. Lolbit (helps team attacks better), Deedee (Get fishes for FazCoins) and Mendo (Helps your team defense.).

its a horror game that its about a family that got murdered in different ways well its hard to explain so i would say use google or i can help for you
this one came from google
"Five Nights at Freddy's is a video game series and media franchise created by Scott Cawthon. The first video game of the same name was released on August 8, 2014, and the resultant series has since gained worldwide popularity."

your welcome

basically what @Firetruck said, but now it there's Pizzeria simulator, VR, AR, and Security Breach... It has a SHIT TON of confusing lore for no reason...
Edit: There's SB Ruin... and VR 2

FNAF is a horror game

It’s a video game series

Fnaf means Five Nights At Freddie's

Creepy game series- with some books attatched

It is TellMyWifiLoveHer's Evil Nation called Fandom Nation

It's a horror game with animatronics trying to kill u because they think u r the guy who killed them, and they won't stop until the murderer is dead. Don't mind the idiots that said sister location is a spin off, it's main series. Sister location is different in the sense u aren't trapped in one room, there are no cameras, and to complete the night u do tasks that are assigned for that specific night. There are also no cameras in 4. And yes, it is a book series

A LINE OF UNENDING SEQUELS. OR PREQUELS. I DON'T KNOW ANYMORE. ASK THE GAME THEORY.

It's a video game