Lately I've been getting into the fanbase of Five Nights at Freddy's.... Have I played them games? No. But I have watched the playthroughs and I have noticed a few things lately between the first game and the second game and have pieced together as to who I think the REAL killer in FNAF was. I believe I know who killed those five children that now haunt the old animatronics of Freddy Fazbear's Pizzaria.

Spoilers are ahead.

First off, Phone Guy is back! The only possible reason this is possible is if the sequal... Is really a prequel. And this is indead hinted at thanks to Phone Guy's dialogue, stating that, following the nights, says that Freddy's has come under investigation from police, and that people have been spreading rumors about the establishment and some tragic incidents that had occurred within the building involving a former employee. Hinting at the murders of the first two children have already occurred. But also the other three have yet to return. Also note that he never once brings up the 'Bite of 87'. He does however mention that they company got the animatronics from another restaurant called Fredbear's Family Diner. And during Night 5 he mentions that you're being moved to day shift and that there is no replacement for you. However after saying this he then mentions that he might just take up Night Shift himself and that the last scheduled event for the place before it closes for investigations, is a birthday party.

Second. The constant references to the new Animatronic, The Puppet. After getting a death from certain animatronics, you might encounter an old Atari style mini-game in which you play as one of the animatronics. All the while you hear a creepy, automated voice that spells out S-A-V-E-T-H-E-M. Not to mention that the mini-game where you play as Freddy involves Freddy chasing the Puppet, who always has his body dragging behind him. During the chase there appears to be pools of blood in some of the rooms.

Thirdly. The animations seen before the next night begins shows a view from within the Freddy Fazbear suit during the first game as it's all the old animatronics fixed up and back on stage with the distinct lack of the new animatronics. Thus indicating this is the Pizzaria during the same time as the first game. However, in keeping theme from the third point, during Night 4 when you get these video feeds from Freddy's view, when Freddy turns to look at Bonnie, The Puppet will be there between Bonnie and Freddy, staring at him. And as Freddy looks away, the Puppet follows, staying withing his sight.

Fourth. Once again, the distinct lack of the mention of the bite of 87. This is where the big spoiler is. Now much like the ending of the first game where you get your paycheck for your services. However the paycheck comes with a surprise... The date on said paycheck reads "11 12 1987!" Meaning that the game hinted that the Birthday that Phone Guy mentioned earlier... Is when the bite of 87 takes place. Pretty much indicating that it is entirely all before the events of the first game. As the first game mentions the bite of 87.

Fifth. Now this is where things come together towards who the true killer is. as we all know, the kids where stuffed into the suits of Chica, Bonnie, Freddy, Foxy, and Golden Freddy, and a former employee is arrested and justice was given... Then why are the hauntings of the animatronics still going on? BECAUSE THE POLICE GOT THE WRONG GUY!!! The children's spirits are stuck until their killer is found out and punished! As I mentioned earlier, some of the death mini-games were where you play as the animatronics. However one of these mini-games involves the Puppet giving gifts to four children and then giving them "life" by putting the costumes on the four children. But the fifth child isn't there because the fifth murder doesn't occur until between Nights 5 and 6. Which is why Golden Freddy only appears in the 6th night! Cause his murder happened during the game itself! But who could've done it?

Conclusion: It's quite simple really. It was The Puppet! His constant appearance and showing that in the mini-games, he seems to be something the animatronics do NOT like! The former employee was merely somebody caught in the middle. That Puppet's presence is EVERYWHERE!! You see kids' drawings of the Puppet giving kids gifts. The Puppet is the real killer! The Employee took the blame cause nobody believed him that it was the Puppet all along! It explains why the kids' spirits can never leave! Cause the real killer was NEVER punished! The Golden Suit was only used by the man that was arrested to hide from the Puppet! He only confessed cause he though prison was the safest place from the Puppet! Their spirits can never leave cause of two reasons.

1. Their bodies were never given a proper burial.

and 2. The REAL killer was never arrested!

So the Puppet is keeping the spirits of those children for as long as he remains there! He never appears in the first game cause he stays hidden away. Or possibly only appears to the Animatronics as a means of influencing the kids ghosts to carry out his dirty work! Same goes for the new ones! The spirits controlled the old ones while the Puppet controlled the new ones! Phone Guy also mentions that somebody had been tampering with the new animatronics! Not to mention Toy Chica (Chica 2.0) also removes her beak and eyes, revealing her endoskeleton, thus giving her a facial expression similar to the Puppet's face! He is responsible for everything! The Puppet IS the real killer!

As for the new animatronics never appearing in Freddy's in the first game. Once the company started to go downhill, they had to sell the more expensive and more advanced animatronics to save money. So the cheaper solution was to put the old ones back to their original shape. And why Freddy's is smaller cause they had to close up part of the pizzeria to, once again, save money. So that part is just basically the company cutting corners.

Oh! And before I forget! Concerning the Balloon Boy animatronic! It's completely harmless and doesn't attack so... No real need to include him since really.... He's just a troll.

But who or what the Puppet is... Is still a mystery. But perhaps it has something to do with the old Fredbear's Family Diner that was mentioned by Phone Guy earlier... Something that nobody is telling us about the Puppet. So it looks like the Puppet might just be the puppet master!