All 13 episodes from the fourth season of the anime based on the light novel series by Kugane Maruyama. The virtual reality game 'Yggdrasil' has gone offline but Momonga (voice of Satoshi Hino) still finds himself active in the game world and becomes Ainz Ooal Gown. As he traverses this new world, the non-playable characters become sentient and believe he is plotting world domination, so Ainz resolves to create a world where humans and non-humans have equal status. The episodes are: 'Sorcerous Nation of Ainz Ooal Gown', 'Re-Estize Kingdom', 'Baharuth Empire', 'The Ruler of Conspiracy', 'In Pursuit of the Land of Dwarves', 'The Impending Crisis', 'Frost Dragon Lord', 'An Unexpected Move', 'Countdown to Extinction', 'The Last King', 'Well-Prepared Traps', 'Invasion of the Royal Capital' and 'The Witch of the Falling Kingdom'.