FNATI remastered 2.0 and 1.0.
To get the night 6 in the 1.0 version you have to get the key in the Tech Room AND open the chest with going to the 2nd floor and open the safe without getting caught by Undying. Thus leading events to Night 6(day 1 in this case). the 2nd version is the same thing, but the only difference is there are 2 MORE endings which is The Alternative and The End.
Well, there is nothing after beating the 5 nights and also night 6 is also quite useless]
End of Disney
TEOD is the same but in night 5 you get strangled by Hell Bound MickMick. And also you have to keep pressing Spacebar. after that you run out and it ends with credits.