I think Legacy has said this to the heavens every year I’m pretty sure.
The practice really seemed to kick off predominantly after 2013, with the debut of All Night Die-In. I'm sure there were plenty of knock-off one-off characters in mazes before then, of course. But off the top of my head...
All Night Die-In > Nightmare on Elm Street, Friday the 13th, Texas Chainsaw Massacre
Horror in Wax > House of Wax/Waxwork
Demon Cantina > From Dusk Till Dawn
Body Collectors > Buffy (still not sure how they've gotten away with cribbing the Gentlemen all these years?)
All Night Die-In: Take 2 > Scream, The Ring, Hellraiser, Silence of the Lambs
Dungeon of Terror: Retold > Motel Hell (some House of 1000 Corpses, too)
Run: Hostile Territory > Hostel
Interstellar Terror > Event Horizon
The Spawning > C.H.U.D.
Saws 'n' Steam > Bioshock
The Forsaken > The Fog
Afterlife: Death's Vengeance > Wes Craven's Shocker
Giggles & Gore, Inc. > arguably a precursor to Killer Klowns
RUN: Blood, Sweat, & Fears > The Running Man
Seeds of Extinction > The Last of Us
There's honestly fewer than I'd remembered (though I'm sure there's a couple I'm overlooking), but part of that stems from the game changing after 2007. Once Universal got access to the actual blockbuster IPs, there were fewer reasons to resort to original takes on unavailable material.