Well, that is so mean.
I like all of them, but if you are going to force me to answer, I'd say

Resident Evil 4

I know. It's kind of obvious, but I really like it.
The enemies are getting stronger by time, you've got moments like 'Fuuuuuuck' , and please, don't forget our lovely merchand :D
He was like my safe heaven, even though I always asked myself how he got where he was and why he couldn't take me with him.
And yes, even with Ashley...>.<
Sometimes shr was like my own fangirl xD

Soo...this is my opinion. :D
Tell me yours in the comment :)

See ya \(^o^)/