I am also a fan of the Silent Hill game myself. The rest are based on the information and guides. The only way to play the game is the 3rd generation, and this is the adaptation of the 3rd generation. Games don't.
Helping the heroine back to Silent Hill in the game is the detective who used to follow her. The detective helps her (the detective is also a father) because he feels guilty about his dad's death (the movie dad didn't die).
In fact, after playing the game, I think the plot of the game can only be said to be okay, but the essence of Silent Hill is the portrayal of people's inner fear.
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