9. The Witcher 3: Hearts of Stone
Why? New DLC Hearts of Stone gives you one hell of a chunk of content, including a brilliant new story and even a few new combat features. There are two types of people in this world - those who finish games like The Witcher 3, and those still left wandering around in search of random enemies, plot threads and the occasional treasure chest. For the former, they've probably already got Hearts of Stone (I certainly have), and are currently tucking into a deliciously dark tale surrounding one Olgierd von Everec, a man with the curse of immortality baying at his heels. In true Witcher fashion, things go sour pretty fast, and with CD Projekt RED including some additions to the core combat in the form of Runewords and Glyphwords that spec weapons and armour respectively, it gives you just enough variation on an already-brilliant melee system to keep going for another 30 hours.