Five Nights at Sonic's: Fierce Forces "Stellar Showoff!" - an own take on FNaS 1 game (different cast, two leaders, no Mario Characters)
P.S. Also, in the art Anew Stellar Sonic from "Stellar Showoff!"

Nocturnal Frights at Sonic's: Fierce Forces "Hush! & Hustle!" - a similar counterpart of FNaF: HW stage of "Night Terrors" as FNaS: FF version and with own take on FNaS 3 Character of the Main Antagonist ~ Salvage Sonic "Gory-Up!"

Fever Daybreaks at Sonic's: Fierce Forces "Aureate Afterglow!!" - a platformer game similar to first Sonic, but played differently... with own take on FNaS 5 cast.

Five Nights at Sonic's: Fierce Forces "Entertain Entrapment!?" - an arcade styled? maze game with own take on FNaS 1 cast.

That's all what I wanted to say. I must go now.