I had thought about this for a few days ago, on if there would be a advanced version of the 4th game.

While it may not likely happen, what if it were ;)

Well let's found out through concepts and ideas i got!

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• Pressing the key button for the Underground Light to appear.

• Neila's mechanic changed, instead of it being a standard FNaF 2 Puppet Mechanic. It's instead like any, a moving character with the music box, in later nights like Night 3 and for the rest of the other nights, Neila will move around. How she can move around, when her stage is next to the office? idk probably sneaking in?

These are the only ones i can only make for this!!

• Underground System Floor on the cameras be available in Night 2? get it, cause the underground light is available from Night 2.

• Jena and Leonard mechanic changes!! this time i had ideas of Jena be the same, but if she is at Leonard's stage. Then the player must be ready to turn on the left light of they office in order to slow her down or potientally move to a diffrent camera. For Leonard, he can go to the center hall instead of just the left door, however the exception is that if you use the light on him. He will just kill you, cause he notices the light now!

• More challenges, can't think of any actually wait-

• Potientally a map change, although even if it is a advanced version, i would like to see a map change with the reverse stage going through a another room, the reason cause it was off to me. If it did get changed, well then there Neila can enter a seperate room and Leonard go there to get into the right door, haha?

• Dark Jena!

  you know the forgotten character that only appeared once in the extras and as a plushie but not in gameplay? well now you do.

  I had planned this to be a character planned on like Night 6? anyway, Dark Jena would start around from the Underground CAM A and will move through basically to the center hall of the office. Once there, the player must flicker the light on her until she retreats and will be gone. She can try go to the underground in order to come to the back doorway. She cannot be seen in that blind spot, but a laugh can be emitted indicating she's here and the player must close the door till she retreats.

These are concept sprites i can get to make.

• A Nightmare Mallie Night, what if a nightmare character that was scrapped and only appears as the FNaTAS 5 demo after max mode appears in Jena's Family Diner and is the Insane horrified version of Mallie, here :)

  This Night like any Secret Night, Nightmare Mallie is a very agressive character. She can teleport anywhere, and go well anywhere. If Nightmare Mallie makes a short breathing noise throughout her part or when she is in Leonard's Stage, then she's at the left door blindspot. Using the light to make her retreat, if she makes a loud breathing noise, it's indicated she is at the back doorway (though not a blindspot) the player would need to close that door.

• A 360 scrolling when trying to go through the back doorway, where you can try scroll through the left or right and that will go through the back doorway.

Although i did not made the images for that.

And PHEW-that's all everything covered through this, its been like a few hours.

Hope yall like the concepts!