How come the killer wasn't Claudia?

Probably because Pyramid Head is much more iconic. He's the first monster that comes to mind and he's been in the most forms of SH media.

Multiple games and he's in the movies.

Claudia is a pretty generic lady imo

Claudia is just a woman. Pyramid Head has a cool design. She's a cool character but PH is much more iconic.

When i say generic im referring to her visually. The pig at least has the pig head to look cool.

Claudia is a blonde woman in a black dress/robe she's not very spooky

I meant in appearance. Yes, we have Pig, and Julie, and Susie, and arguably Huntress, who's just a really tall woman lol. PH is unlike anything in the game. And like @BBQnDemogorgon said, more opportunities for cosmetics.

I like Claudia, I'm just giving reasons why I think the devs chose PH.

To give you an impression of just how well know pyramid head is, my non-gaming friends know who he is, and he's also the only character I remember well from the series.

Just like how they could have chosen other characters for stranger things, they chose the most recognisable ones.

Oh yeah if the others are kids no way they're getting in. Fake child murder is the only kind of murder worse than showing virtual boobs.

That's because silent hill is one of those *very* well known/great series that hasn't gotten a game in about a decade; it's pretty much a way to guess how old people are if they are aware of it or not lmao.

Silent hill is a classic dating back to the ps1, and was a technical and atmospheric marvel at the time. Ironically the low power of the ps1 forced them to implement ideas that became standard in the horror genre, even in DbD.

Yeah, silent hill will still come up, but actually playing the early ones are ps1 only so not everyone has the will to bother emulating it. Dead space and resident evil are probably more likely to be played, along with the later silent hills that don't feature pyramid head.

You're correct, but the development time was probably before season 3 was released, and the Devs probably weren't aware of how big a character robin would be. I've only watched 1.5 seasons of stranger things so Nancy and Steve are who I know the most.

Who?

Probably because Claudia is in, like, 1 game, and the movie many fans didn't like. Pyramid Head was in SH2, both movies, and Homecoming. Hell, one of the endings of Homecoming has you being turned into a Pyramid Head. Another thought is that he was in the movie, and many people didn't like the movie that Claudia was in. There's also the idea that Claudia herself was never a boss. She just becomes the boss. Pyramid Head stalks you in SH2. In several cases giving James the hope that he and Maria can escape, only to kill her. As far as Heather being from the 3rd game, and Pyramid Head being from the second not feeling like it fits. Well, the map is from the first game. So it's sort of a 1, 2, 3 kind of thing.

Imagine someone who has, at best, a passing knowledge of Silent Hill. Maybe they played the first couple games a long time ago, whatever. There is a way more likely chance of them seeing this and going "Oh yeah, I remember that Pyramid Head dude, those games were scary." I'm sure you are aware of how this character is one of the most visually iconic things attached to the Silent Hill series, and how this fact would much more closely align with Behaviour's broad audience intentions.

Yes, this would be like me asking "Why is Leatherface the killer instead of the Hitchhiker?" The Hitchhiker is the catalyst for the events that befall the cast of the original Texas Chain Saw Massacre. He is as much of an antagonist as either of his family members, and Leatherface gained more prominence starting in roughly the 1990s. Someone who isn't deep in the weeds in the franchise knows Leatherface.

Or, maybe even more appropriate and 1:1 -- if they make a Friday the 13th chapter, why not have Pamela Voorhees as the killer? The answer is because Jason is way more iconic and more closely associated with the franchise.

Mainly because nobody who hasn't played Silent Hill would recognize Claudia.

Pyramid Head is far more iconic and thus more likely to sell.

I'm not arguing about who the main antagonist is, I'm arguing over what an average person is most likely to recognize as being iconic and closely associated with the franchise. Scorpion is the mascot and absolute most recognizable character in Mortal Kombat, but no one would remotely consider him the protagonist in any of the games.

(...now that I think of it, I totally want a Mortal Kombat chapter with Scorpion as the killer, and someone like Sonya or Johnny Cage as the survivor.)

I want nothing to do with the blasphemy that was Silent Hill Revelation 3D ... Rather it be Pyramid head