Ghostbusters Fan Made has several references to movies, pop culture, video games, previous fan made movies and much more. Here are all of them noted down.
Also this thing updates everyday, so if there's something that isn't here and should be, we'll be adding it on later for sure
Ghostbusters 1:
Chucky is one of the main and the FIRST ghosts/things that the Ghostbusters have busted. And this is of course an obvious nod to the Child's Play franchise.
Ghostbusters 2:
One of the first ghosts busted in Ghostbusters 2 Fan Made Granny from the Granny game franchise. Even Grandpa from Granny: Chapter Two can be seen dancing in one shot.
The second ghost busted in Ghostbusters Fan Made is a nod to the It franchise, more specifically the remake version (2017). Pennywise was the second ghost busted in Ghostbusters 2 Fan Made
One of the most legendary person in memes of all, Rick Astley was also referenced in Ghostbusters 2 Fan Made. However, you don't get rick-rolled.
The final boss at the end of Ghostbusters 2 Fan Made was the Demogorgon, a nod to Stranger Things.
Ghostbusters: A Verry Merry Christmas
The famous line from Ghostbusters 2 "Do you want to die" 'I don't mind" was re-used
Granny is again visible
The ending references the starting of Ghostbusters 4
Ghostbusters 3:
Slimer was used to bust as a ghost again.
Ghostbusters 4:
No references in Ghostbusters 4 as well
Ghostbusters 5:
The final boss of Ghostbusters 5 Fan Made was supposed to resemble Godzilla, specially when Ivaan was stomped on by a big foot. However, not a lot thought it was a direct reference, and it wasn't anyways.
"Trouble" from Alvin and The Chipmunks: Chipwrecked is played in the casting scene of Ghostbusters 5 Fan Made. This is a nod to the Alvin and the Chipmunks franchise
Ghostbusters 6:
The final boss of Ghostbusters 6 Fan Made can clearly be seen as Godzilla
Ghostbusters 7:
Raghu talks about how they used to bust ghosts, referencing all the movies before Ghostbusters 7.
Ghostbusters: A Killer's Day
The lines Raghu says when he is possessed is heavily inspired from Chucky (eg: "I WILL KILL YOU!" and "COME BACK HERE"). However, this was more overly inspired from the Chucky in the video game Dead By Daylight, which is what Raghu liked playing at the time and decided to take Chucky's lines from there. Raghu also has the similiar deep, scratchy voice like Chucky's, and laughs like him as well. Thought this is meant to refference Chucky, he isn't actually possessed by Chucky, as in Ghostbusters 7 and the later movies, it's seen that he was possessed by a demon.
Ghostbusters: Severance
Abeer is transformed into Chucky, obvious reference to Chucky from the Childs Play Franchise
NOTE: Chucky's voice in Dead By Daylight is also taken from the Child's Play franchise.