Why don't FNaF games all appear on steam when you search for them

Steam Workshop::FNAF COMPLETE PACK

Since the FNaF games don't have proper banners/covers on Steam, I'm making my own. Here's FNaF 1 and 2. : r/fivenightsatfreddys

All FNAF games in order

Five Nights at Freddy's: Security Breach release date: Is it coming to Oculus Quest, Vive, and PSVR? - GameRevolution

Five Nights at Freddy's Theories — New Teaser: Don't Hold It Against Us + Source

All FNAF games in order

How to Play the Five Nights at Freddy's Games in Chronological Order - IGN

Five Nights at Freddy's Plus is no longer available on Steam. : r/fivenightsatfreddys

A New 'Five Nights at Freddy's' Game Appears on Steam For Free - Bloody Disgusting

The 10 best Five Nights at Freddy's games, ranked - Dot Esports