Bloodborne is a solid pick! Honestly all of those games are iconic.

DS2! Played the hell out of that game in college with a buddy of mine. Good times. What about you?

Really hard to pick between Pokemon Blue and Shadow of the Colossus, but I'd probably go with Pokemon since that was also my intro to video games.

I realize it isn't the best in the series but it's DS2 for me. Fond memories with that one.