When a mafia leader is killed, his son and the deadliest assassin in the mafia compete in order to be the new leader.

作品主要讲述了某天，一款掀起大热潮的VRMMORPG「YGGDRASIL」原本会停止一切服务，但即使过了结束时间，玩家也不会退出游戏，NPC也有了各自的思想。现实…

In the year 2138, virtual reality gaming is booming. Yggdrasil, a popular online game is quietly shut down one day. However, one player named Momonga decides to not log out. Momonga is then transformed into the image of a skeleton as "the most powerful wizard." The world continues to change, with non-player characters (NPCs) beginning to feel emotion. Having no parents, friends, or place in society, this ordinary young man Momonga then strives to take over the new world the game has become.

During World War II, a young man is called up and, with an increasing sense of foreboding, undertakes his army training ready for D-Day, June 6th, 1944.

France, June 1944. On the eve of D-Day, some American paratroopers fall behind enemy lines after their aircraft crashes while on a mission to destroy a radio tower in a small village near the beaches of Normandy. After reaching their target, the surviving paratroopers realise that, in addition to fighting the Nazi troops that patrol the village, they also must fight against something else.

时间为2138年。曾卷起一大风潮的虚拟现实体感型网络游戏《YGGDRASIL》即将迎来停服。玩家飞鼠在曾经以同伴和荣华自傲的根据地纳萨力克地下大坟墓，独自一人安静等待着那一刻。 但是，不料发生了“过了结束时间却还没有登出”的异常事态。NPC们开始以自己的意志行动，不止如此，纳萨力克之外展开了从未见过的异世界。飞鼠为了寻找过去的同伴，以公会名安兹·乌尔·恭自称，决定在异世界扬名立万。他与宣誓绝对忠诚的部下一同，向新的地域进军。

OVERLORD Ⅲ特别篇Q版动画

单行本第11卷同捆OAD。新作动画时长30分钟，守护者全员将全数出场。

作品主要讲述了某天，一款曾经掀起过大热潮的VRMMORPG「YGGDRASIL」停止了运营。游戏原本会停止一切服务，但过了结束时间后，玩家们却发现不能退出，NPC也产生了各自的思想。现实世界中喜爱电玩的主人公铃木悟（真名）在等待系统强制登出时，与“安兹·乌尔·恭”公会的成员一起意外穿越到了异世界，并且变成了拥有骷髅外表的最强魔法师——“飞鼠”。就这样，真正的奇幻传说正式拉开了帷幕。

For siblings Brie, Daniel, Crew, and Jess, family has always come first. But when Crew (Daniel DiTomasso) invites his girlfriend Sara (Kate French) into the family, distrust begins to bubble between the siblings. Seeing Sara as a threat, Brie (Fiona Dourif) grows spiteful and increasingly suspicious that she is being replaced. That is, until the night Crew attempts to murder her in their family house. Traumatized, Brie is sent to a mental facility where she is tormented by hallucinations of Crew from the night of the attack. But when the visions begin to bleed into reality, Brie starts to fear that it’s not just her sanity that’s in danger, and she flees the facility. In a frantic attempt to return to her remaining siblings and warn them, Brie begins to uncover a trail of gory, sinister secrets that lead her to believe that she might not know her family as well as she thought.