Who would even play this game ??

[Adny]

@ OP: Horror games played for the same reason we watch scary movies or go on roller coasters - the pseudo adrenaline rush. We trick ourselves into thinking it's dangerous, when in reality all of those things are safe and can be laughed about when we look back in the future. It can be quite a euphoric feeling for some.

In your case (feeling chest/heart pains), I'd seriously suggest you stop playing and contact a doctor, you could have a serious medical condition you weren't previously aware of.