Some games allow unforgettable yes. And one for me was the battle is a little faraway in the game Breath of Fire IV, the former generation of PS against Ymechaf in Chinese castle.
I had to go to college to study late, and I swore to myself I would only go to college if I win it. The boss does not want to die ever, seemed invincible. Also with over 500hp is a bit complicated. But alas, I have tired and cranky, using all possible forces of the dragon Ryu, Ymechaf finally demonstrated the sign of defeat.
What a relief.

