Silent Hill musings

I've been thinking for a while now about Silent Hill crossovers. I know both of mine (an Original Character-centric one and the recent Transformers one) draw heavily from Silent Hill 2, and, even before I finished the first, I thought it was a bit weird. Almost - or maybe all of the Silent Hill crossovers I've read have done the same. Why?

( Actually, the answer's obvious. )

On a completely different note, cards?