7. Dark Souls
Sometimes you need a game to be a game, and for what Dark Souls lacked in accessibility, it more than made up for with a blend of old-school rock-hard difficulty, new-age environmental design, lore depth and - in spots - stunning visuals.
Literally like some NES-era plot of "You're in a world, go progress and figure everything out as you go", it's the best way to make you interact with your surroundings. Going from a skin-torn prisoner to armoured-up knight, you'll learn - after being flattened by one of many bosses - how to better evade, parry and prepare yourself for the horrors ahead.
Best of all, there is a story and world underneath all the controller-smashing fury, though it's one assembled through interpretation, as the journey is the real adventure. Whether you endure solo and live off other players' advice they leave behind - or summon someone in to aid the fight - Dark Souls embodies the mentality of gamers trading and sharing tips in person. It results in a phenomenal sense of community, battling adversity and the need to overcome obstacles together - something that makes Dark Souls one hell of an experience, no matter when you take up the challenge.