Isekai is not always dreamy; it also encompasses works that realistically explore war, betrayal, and loss.
1. Overlord

Overlord narrates the tale of Momonga, a sorcerer who remains in his favorite VR game after the servers cease operation. He realizes that the game world persists even after server shutdown. Filled with humorous elements, it doesn't lack moments of darkness. Momonga, an anti-hero, unhesitatingly uses his formidable powers to take lives if it serves his purpose. Essentially, it's a darkly comedic anime, an ideal choice for those seeking a story with world-altering events.
2. Grimgar of Fantasy And Ash

Grimgar of Fantasy And Ash offers bright moments but doesn't shy away from a heavy narrative. A group of teenagers trapped in another world, with no memory of how they arrived or understanding the world's rules, is compelled to fight for survival and earn a living. Clueless about combat, their only option is to stand side by side. Even maintaining this fragile bond proves to be exceedingly challenging.
3. Re: Creators

Re: Creators stands out as an anime with intriguing concepts. Unlike most typical isekai, it flips the narrative as characters from various worlds come to ours. Many characters from different universes converge in the real world, all originating from fictional novels created by authors in other worlds. What happens when a character confronts the person responsible for all the troubles they face?
4. Arifureta

Arifureta's protagonist is a typical geek, along with his classmates, thrust into a fantastical world. Hajime, the least useful among his classmates with seemingly powerful skills, willingly takes on a support role. Everything changes when Hajime falls into a abyss and must fight for himself. In this ordeal, he confronts his own weaknesses and transforms to gain enough strength for his return.
5. Rising of the Shield Hero

The Shield Hero starts quite dark, like any other isekai. The main character is summoned to another world, betrayed by those begging for his help. With no other option for self-defense, the protagonist is forced to navigate through shady schemes. While the story concludes somewhat intact, the plot is consistently grim.
