If you found yourself addicted to Overlord, you will be pleasantly surprised to learn many other anime based on massive multiplayer online role-playing games exist for you to try. Anime similar to Overlord follow similar premises, with protagonists immersed within fantasy realms markedly different from the "real world."
Loads of anime like Overlord build upon the fantasy video game setting and take it in completely new directions. Some fully embrace the RPG themes, while others juxtapose them with real-world politics. Though most Overlord-like titles are video game-inspired anime, many titles even portray their fantasy world as the "authentic" world, meaning characters may not even realize they live in a simulation. Should you be looking for a series you can really immerse yourself in, these anime offer entire worlds that both you, and the series' protagonists, may escape to.
Overlord fans looking for an anime that treats its online gaming world as the real thing should check out Is It Wrong to Try to Pick Up Girls in a Dungeon? Unlike Overlord, the world of Is It Wrong to Try to Pick Up Girls in a Dungeon? isn't a virtual reality world gone wrong, but a real-life world that functions on similar principles. Basically, it is a fantasy game brought to life. This means more time for fun RPG-inspired adventures.
GATE explores the connection between reality and gaming in the same vein as Overlord. What's different is that GATE isn't about an immersive VMMORPG, but rather a video game crossing over into reality, blurring the line between the two. While Yōji Itami from GATE lacks Momonga's invulnerability, his life as an otaku gives him an edge in this mysterious fantasy realm.
Both Overlord and No Game No Life focus on individuals unhappy with the real world who wish to stay in the fictional paradise they created for themselves. No Game No Life isn't about an online RPG world, but a world where every dispute is resolved by winning games. Siblings Shiro and Sora use their intelligence to rule their new surrounding, much like how Momonga uses his high-level skills to rule Yggdrasil.
Just like Overlord, Log Horizon tells the story of a video game that traps players in its virtual reality. What's different is that Log Horizon isn't primarily focused on the heroes trying to escape their RPG world. Instead, it explores every aspect of online gaming while prioritizing the game mechanics of its world, and does so with a little more lightness than Overlord.