What are the names of all the Silent Hill Games + What other games would i like?

I know they have one two three four and five, but what are all the names of them?
The other day i saw a game at best buy then looked for it used at game stop but i couldn't find it because i didn't know what the name was.

I think it was like the origins or something.

Also:

I REALLY love silent hill, i bought 3 yesterday.
Im hoping to find more games like this, and also buying the next two games because i'm not sure if i should get the earlier ones, would they be too old?


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Silent Hill
Silent Hill 2
Silent Hill 3
Silent Hill 4: The Room- crazy hikikomori trapped in his house
Silent Hill Origins- It's about a trucker who gets lost in SH
Silent Hill Homecoming
Silent Hill Shattered Memories- to different to say a remake of the first
Silent Hill Downpour- not released yet

I don't play survial horror games but I do like to study the games... with the exception of 4 all other games were rated high... I'd say get them