God of War Ragnarok is definitely a fat boy. It weighs 90 GB and 96 GB on PS4s and PS5s respectively. Naturally, the story of Kratos and Atreus needs a great conclusion, so expect to play the game for at least 20 hours. Also, the world of God of War Ragnarok is bigger than 2018's God of War. Though, the 2018's version of the game has a far better story.