9 - Dark Souls

Dark Souls 1, 2 & 3: (By implication, Demon Souls though I have never played it.) Any game that starts off in its title with "Prepare to Die" and is not kidding has got to be strong. In these games it is all about the combat and the lore. In equal measures for me. Learn to duck, parry and dodge. Learn to die. Save early and often. Save before every boss if it will let you. Rinse and repeat. Once you get comfortable with the combat, make the acquisition of lore your goal. There is a lot of lore out there and the game will not spoon feed you one ounce of it. So go get it. It's a wonderfully complex world which is very consistent through the three games. To a degree. This is up in my top 5 series.