When they revealed that Samus was female.
I was like... Woah, so I guess girl can do more than just cook, right?
Just kidding, obviously, my actual answer is Castlevania: Lords of Shadows when they reveal that Gabriel is Dracula and his entire journey its just for him to fall from grace and into darkness. Its interesting to have a main character that saves no one, becomes the main antagonist of the game, and still enjoy it. I mean, you can see that coming, but the way it happens its great storytelling. Plus, in a fanchise with 993741739 games its so fullfilling that they can still pull an original story they haven't tried before.
Then they went to create the atrocius Lords of Shadows 2 u_u







