In the art:
Alter Clone Sonic ~ FNaS: MMMM & Clone Sonic "Tune-Up!" ~ FNaS: FF

The Progress and main change:

Around 20ths of December 2020y:
Birth of FNaS: Maniac Mania "What If?" ~ The Prototype (Fan-Comic)

10.11.2021y (on my 1st spawn day)
Change to FNaS: Fiercy Forces "What If?" ~ The Pre-Alpha (Fan-Comic)

07.07.2022y:
Change to FNaS: Fiercy Forces "Imagine It!" ~ The Project (Fan-Comic)

Birth of FNaS: FF "Stellar Showoff!" (Fan-Game) 21.04.2023y

Birth of NFaS: FF "Hush! & Hustle!" (Fan-Game) 03.08.2023y ~
Before around 24.02.2024 known as "Hideaway & Hunt"

08.02.2024y:
Correct name change to FNaS: Fierce Forces ~ The True Project (Fan-Comic)

Birth of FDaS: FF "Aureate Afterglow!!" (Fan-Game) 05.05.2024y ~
on 21.12.2024 changed the title from Fever to Fervor

Birth of FNaS: FF "Entertain Entrapment!?" (Fan-Game) 08.08.2024y

The series includes (Fan-Comic part):

Fierce Forces: ~Frenzy's Ferocity~

Five Nights at Sonic's: Fierce Forces "Imagine It!"

Five Nights at Sonic's: Insane Immerse "Route of Recollect"

Five Nights at Sonic's: Mega Merge Max Mix

Sonic Forces: Afterwards Actualize "Different Dimension!"

Sonic Forces "Different Dimension!"

Other Changes:

Fierce Forces: ~Frenzy's Ferocity~
known before as - Fierce Forces: ~Frenzy's Rabidity~
(The idea birth ~ beginning of March 2024)

Five Nights at Sonic's: Mega Merge Max Mix
The scrapped Maniac Mania "What If?" was supposed to be changed and exist as Maniac Mania "Different Dimension" (also corrected to: Five Nights at Sonic's: Maniac Mania "Different Dimension!")
as a part (before) starting of Fierce Forces and even Insane Immerse. Finally it has been rebranded and rebooted into an alternate Maniac Mania.

Five Nights at Sonic's: Insane Immerse "Route of Recollect" (An addon Fan-Comic) (changed the name on 12.11.2024)
before known as - Five Nights at Sonic's: Widerise Mingleverse "Route of Recollect" (At the time of making the prototype comic, the prototype addon "The Gathering" was made from FNaS 1-4 around July 2021 and was about saving the night guards from pizzerias. The concept has changed into Fierce Forces project on the beginnig of 2024 and it's a planned addon to be made)

Sonic Forces: Afterwards Actualize "Different Dimension!"
before known as - Sonic Forces: Afterwards Alacrity "Different Dimension"
(changed: end of september 2024)

Sonic Forces "Different Dimension!"
before known as - Sonic Forces "Different Dimension"
(changed: end of september 2024, same around that time, only added exclamation mark)

Fun Fact: Didn't said that, but: Even before Five Nights at Sonic's: "What If?"
the fist made post was about a brand new character, that was supposed to appear in FNaS (ofcourse not officially) and was made as the idea of ​​calling the series:
Five Nights at Sonic's - Anew Face.

Later then the short comics appear with, guess who: Security Guard Silent. After that, the series moved into "What If?" and then the main comic was made as prototype, but while in production the files were still named as FNaS-AFComic. Even Origin Sonic in "What If?" mentioned of Security Guard Silent, by saying a line, that included "Anew Face" as a reference of brand new character that appeared in FNaS. Huh, how funny.

Technically, also a genesis of the Skin name of Clone Sonic "Tune-Up!" aka.
Anew Stellar Sonic.

(Fan-Games part)

Five Nights at Sonic's: Fierce Forces "Stellar Showoff!"

Nocturnal Frights at Sonic's: Fierce Forces "Hush! & Hustle!"

Fervor Daybreaks at Sonic's: Fierce Forces "Aureate Afterglow!!"

Five Nights at Sonic's: Fierce Forces "Entertain Entrapment!?"