I literally just made an account to correct all the wrong misconceptions and assumptions that are going around here...let's start.
1. This is a $5 dollar game, will be coming to Steam soon

http://steamcommunity.com/sharedfiles/filedetails/?id=270684111
2. For all those who are "I want to get it but not sure" or "I doubt, but I didn't play it" people. THERE IS A FREE DEMO! YOU HEAR ME RIGHT! FREE!
A FREE DEMO THAT ALLOWS YOU TO PLAY THE FIRST TWO NIGHTS. I am amazed nobody pointed that out yet, and nobody knew about it....
Here, because I am afraid some of you won't notice even though I have caps on, I will post THREE...THREE DIFFERENT LINKS to the demo download.
http://www.amazon.com/Five-Nights-Freddys-DEMO-Download/dp/B00M292RFS
http://www.indiedb.com/games/five-nights-at-freddys/downloads
http://www.moddb.com/games/five-nights-at-freddys/downloads
Is that enough? Or do I need to post them again?
Just telling you, those two nights are NOWHERE near what the actual in-game experience is. Actually...Night 2 felt harder when I got the actual game. The demo has things toned down a bit for some reason...though not entirely sure. It could be because the A.I is so random and different every time, it happened to go aggressive in the 2nd night.
And yes..THIS HAS A REPLAYBILITY VALUE!!!
I'll start with the least obvious (cuz hahaha). Back when I only had the demo, I got addicted after finishing the second night, so I kept re-playing the 2nd night until I found out the game 2.50. I almost thought the 2nd night was enough for me because EVERYTIME I RE-PLAYED IT...IT WAS DIFFERENT! Yes, the overall difficulty was the same. The A.I, the way it moved, it was like playing another night.
For example, my first try had a rather polite Pirate's Cove guy, who stayed in his place most of the time. But DAMN BONNIE AND CHIKA! Bonnie was constantly camping at my left door. Causing me to keep it closed for prolonged amounts of time, even when he actually isn't there! That is until I discovered a trick with the lights and the shadows. Bonnie would then suddenly go to a far corner of the building, only for Chika to be right at my doorstep! It was as if they were constantly changing roles. Near the end of the night, they started to get impatient, and both attacked at the same time. But 6AM came before they could do anything...thankfully *nervous laugh*
The second time had Foxy going CRAAAZZZZZYY! Even while phone guard was talking, the guy was out of his curtain and with his knives...*cough* *cough...hook out. He ran and sprinted at me twice that day...
On the contrary, Chika was very polite, staying with Freddy in the little robot room for more then half of the game. And when she sprung up, he only alternated between the dinner area and the bathroom...Thanks Chika for being a nice robot!
Bunny did pretty much what he did in the first night, but less aggressive and campy. Sometimes moving away from my room.
Much examples...eh?
Anyways, the the three other nights bring new things to the table, such as Freddy himself (he does not appear in the demo...unless you *censored for spoilers, and to keep the surprise

*
That reminds me, the game is a little less scary if you read ten-thousand guides and let's play to teach you every single thing about the game. Don't do it, you will ruin the surprise of ######-###### ####
Anyways, I almost forgot, I was going to tell you about the obvious replaybility options!
There are actually 7 nights. Yes, the title is lying. After finishing the 5th, there is a 6th night. The Nightmare/You Will Die/Impossible mode. That one is a tough nut to crack, and it will take you a lot to finish it (Though one guy finished it on his first attempt due doing a what-would-be-a-mistake on the other nights, but is actually very effective in night 6, and the A.I was instance in that one was rather easy.
After that, we have the true replaybility option. After finishing the 6th night, you get a 7th, custom night. In this one, you can change up the A.I of your adversaries from a level of 0-20. A total of 21 difficulty levels. Some people say you can unlock a new ending by setting the difficulty levels to certain numbers/order. some people say it's 20/20/20/20...ERRGHH..THAT IS IMPOSSIBRU! Others say it's 1/9/8/7, Night 2-3ish difficulty. You will also get out of it without your frontal lobe.
Ahh...I think I am finished now. But I want to insert my personal opinion about things into this..
I don't think they actually want to put you into a suit. It is obvious they don't want to help you into a suit because you are a fellow robot without his stuff on. The way the creep you out, the IT'S ME. The way they come in, get out, scream, yell, move, twitch....and the NIGHT 5 CALL...OH MY GOD...It's obvious they want to KILL YOU. Get you...torture YOU!
I think that your character is hobo, who, like everybody, did not know about the dangers of the job until they were given the first night call. Of course, the ad seemed to give you an easy money job of sitting in a security room and sneezing still 6AM, though that is far...far...from the truth.
Finally, I want to say...a sequel is confirmed http://steamcommunity.com/workshop/filedetails/discussion/270684111/34095131801828993/#c34095131820810002