Alrighty then, let's jump into it. If you haven't read part 1, go read that first before proceeding.
Are the events of Silent Hill 1-3 real? Those who prefer to think that they aren't, are in for quite an offense. I'll start with the supporting characters.
So, you think Silent Hill is all in youre heade? Okay. Explain the supporting characters then. How can the other people you interact with exist, if it's all in your mind? And you might be saying something like "oh, those people are just representations of [ blah blah Freudian Psychology 101 ]".
Well, if all those people in Silent Hill 2 are somehow in the head of the protagonist, that raises certain questions:
–How? How can people live inside your head? How can you have that? I personally never heard of anyone who has people living in his/her head. Yes, we all heard of insane people who have people living in their heads (or so they claim). Well, I never did, and so refuse to believe.
–If SH supporting characters are really representations of protagonist's guilt, then what about those characters who do not represent fucking anything?? In the favorite game of the "in your head" proponents, Silent Hill 2, Laura does not represent shit. That contradicts the "all in your head" directly.
–Supporting characters' backstory. In the much beloved SH2, Angela was raped. Eddie was abused for being fat. What does that have to do with James Fucking Sunderland?? Was James fat? Was James raepd? NO. What do those backstories represent symbolically (there is that word again) in relation to James? FUCKING NOTHING. How can these people be imaginary, if their backstories have nothing to do with James? The answer is, they cannot.
–If everyone is imaginary, how can your imaginary characters know information you never learned? Eddie told James Laura's name. Angela told James about the monsters, before James ever saw one. Maria feels like she was meant to protect Laura, which reflects the feelings Mary had for the girl; James never knew they were friends. All those supporting characters in SH2, at least at one point, knew something James did not. That would indicate that they cannot be imaginary, and must be real people.
Okay, I hope these are some convincing arguments to convince you that the events of Silent Hill 2 did not happen in James's head. If you are still not convinced, then wait for part 3!