Few modern isekai series have enjoyed the same level of long-term success as That Time I Got Reincarnated as a Slime. What began as an unconventional story about an ordinary office worker reborn as one of fantasy’s weakest monsters has evolved into a sprawling saga filled with political intrigue, nation-building, memorable allies, and spectacular battles. Rather than relying solely on overwhelming action, the series balances humor, diplomacy, and world-building in a way that keeps every new season feeling fresh.
That blend of powerful characters, creative fantasy concepts, and surprisingly heartfelt storytelling is exactly why Rimuru Tempest’s adventure continues to attract new fans years after its debut. Whether viewers enjoy overpowered protagonists, kingdoms built from scratch, lovable monster companions, or clever twists on familiar isekai tropes, there are plenty of other anime capable of capturing that same magic. These 20 series each offer something that That Time I Got Reincarnated as a Slime fans are likely to appreciate.
20
Reborn as a Vending Machine: I Now Wander the Dungeon (2023)
Based on the Light Novel Written by Hirukuma
If fans thought being reincarnated as a slime was wild, try a hero who gets reincarnated as a vending machine. Reborn as a Vending Machine is exactly what it says on the tin, as the protagonist Boxxo is indeed reincarnated into a fantasy world as a vending machine. However, unlike Slime which gave Rimuru a suitably cool design, Vending Machine is fully committed to making Boxxo a functioning vending machine.
More than just a hilarious parody of isekai tropes Reborn as a Vending Machine actually has some clever writing as the series finds increasingly clever ways for Boxxo to use his vending machine powers. Fans of isekai shouldn’t let the ridiculous premise or Boxo’s goofy design fool them, as Reborn as a Vending Machine is a series that actually gets fairly significant mileage out of its ridiculous premise.
19
The Devil is a Part-Timer! (2013)
Based on the Light Novel Written by Satoshi Wagahara
Unlike most Isekai anime, The Devil is a Part-Timer takes a novel approach to the reincarnation trope by transporting a fantasy character into the normal world, aka “reverse isekai”. Satan is trying to take over the territory of Ente Isla, but, when he is cornered, he escapes through a portal that spits him out in modern-day Japan. Upon arrival, Satan and the followers change into humans and are forced to contend with their new surroundings. To survive, Satan takes on a part-time job at a local fast-food restaurant, MgRonald’s, while also keeping an eye out for old enemies in this strange new world.
The series is full of comedy and cleverly subverts viewers’ expectations time and again. In a way, The Devil is a Part-Timer is the exact opposite of That Time I Got Reincarnated as a Slime, as instead of a not obviously powerful being becoming powerful as in Slime, The Devil is a Part-Timer is about an incredibly powerful being forced to work a low-paying job.
18
By the Grace of the Gods (2020)
Based on the Light Novel Written by Roy and Illustrated by Ririnra
By the Grace of the Gods follows Ryoma Takebayashi, a salaryman who works in a black company, eventually dying from overwork before getting summoned to a fantasy world by three gods, reincarnating as a child and becoming a merchant expert in taming and collecting slimes for multiple activities. The anime is a charming slice-of-life isekai, without much action or conflict, as it focuses on Ryoma now having the chance to live a relaxed, mellow life, which makes for some heartwarming moments.
Just like TenSura, By the Grace of the Gods is a lighthearted isekai where the slimes play a major role in the story, as Rimuru is a slime himself and Ryoma tames and collects different types of them, but also shares relaxing vibes and smart, industrious protagonists. Like Rimuru, Ryoma uses his knowledge of the human world in his new reality, but instead of becoming the leader of a nation, he creates different artifacts and becomes a business owner.
17
Mushoku Tensei: Jobless Reincarnation (2021)
Based on the Novel by Rifujin na Magonote
Referred to as the “grandfather of isekai”, Mushoku Tensei is a lush series filled with a large ensemble class, a complex magic system, and a political system that drives the main story. The main plot of the series follows Rudeus, a young man who, in his previous life, was a problematic degenerate trying to redeem himself and lead a better life now that he’s been reincarnated.
Starting out as a toddler, Mushoku Tensei explores many of Rudeus’ major milestones, being trained in magic for the first time, and spends time exploring his life as he ages and becomes an adept adventurer. Playing itself more straight compared to isekai with stronger comedy leanings, Mushoku Tensei excels in drama, with season 2 reuniting Rudeus with one of his childhood friends and seeing the two get married.
16
I’m Standing on a Million Lives (2020)
Based on the manga by Naoki Yamakawa
I’m Standing on a Million Lives follows a group of middle school students transported to a medieval fantasy world to complete quests, returning once they’re finished only to be summoned again sometime later. Somewhat of a mix between an isekai and a teenage slice-of-life series, I’m Standing on a Million Lives wears many hats.
While the plot is ridiculous and the characters – particularly the protagonist – can be tough to take seriously, there’s a hearty dose of humor in this isekai adventure, and characters like the Game Master introduce enough intrigue to keep viewers engaged throughout the season. Fans of That Time I Got Reincarnated as a Slime may find the series’ irreverent tone to be particularly appealing, as I’m Standing on a Million Lives is probably best enjoyed if fans don’t take the events too seriously.
15
Grimgar Ashes And Illusions (2016)
Based on the light novel Grimgar of Fantasy and Ash written by Ao Jumonji & illustrated by Eiri Shirai
Many protagonists in isekai anime become overpowered shortly after being reincarnated, but this is not the case in Grimgar Of Fantasy And Ash. This anime is set in an RPG-like world where a group of amnesiac strangers is forced to work together to survive. The setting of the anime is brutal and realistic, and the characters face genuine challenges that could easily kill them. Even low-level goblins are no easy task for the group of adventurers, which makes their journey all the more gritty and realistic.
The series follows a group of adventurers who have no memory of how they arrived in a dark fantasy world. Unfortunately not cut out for the adventuring life, a team of rejects led by the thief Haruhiro band together to try and make a living in the brutal world they now call home. Fans of That Time I Got Reincarnated as a Slime will appreciate that Grimgar Of Fantasy And Ash takes the fantasy genre seriously and isn’t afraid to take a dark turn when appropriate.
14
Log Horizon (2014)
Based on the Light Novel by Mamare Touno
Log Horizon begins like any other isekai anime. At the start of the series, 30,000 gamers from Japan become mysteriously trapped inside a virtual reality game. One of the players, Shiroe, is a wily veteran of the game and manages to attract a group of fellow players stuck there with him. Together, Shiroe and his companions navigate the game’s adventures and learn how to coexist with the game’s NPCs known as “natives.”
Log Horizon doesn’t try to reinvent the wheel or do anything new in the genre, but it’s a solid series that sticks to a tried and true formula. It’s a classic adventure story that checks off all the boxes when it comes to swords, sorcery, and fantasy drama making it a great anime for fans of That Time I Got Reincarnated a Slime to get lost in.
13
Black Summoner (2022)
Based on the Light Novel Written by Doufu Mayoi and Illustrated by Kurogin
Kelvin willingly gives up all memories of his previous life in exchange for extraordinary magical potential before being reincarnated into a fantasy world. Blessed with the rare Summoner class, he quickly begins recruiting powerful companions, including the goddess Melfina, the knight Efil, and several formidable monsters. Unlike many reluctant heroes, Kelvin actively seeks stronger opponents, viewing every dangerous battle as an opportunity to test the limits of his rapidly growing abilities.
The constant expansion of Kelvin’s party shares many similarities with Rimuru’s ever-growing circle of allies in That Time I Got Reincarnated as a Slime. Both protagonists transform former enemies into trusted companions while steadily increasing their influence across the world. Packed with flashy magic, large-scale battles, and satisfying progression, Black Summoner offers the kind of power fantasy and monster-filled adventure that many Slime fans enjoy most.
12
The Faraway Paladin (2021)
Based on the Light Novel Written by Kanata Yanagino and Illustrated by Kususaga Rin
Unlike most isekai protagonists who are immediately thrown into action, Will grows up in the ruins of a forgotten city, raised by three unlikely guardians: the skeletal warrior Blood, the ghostly sorcerer Gus, and the mummified priestess Mary. As they teach him swordsmanship, magic, and faith, Will slowly learns both the history of his new world and the sacrifices that allowed him to survive. Their emotional bond forms the foundation of one of the genre’s most heartfelt coming-of-age stories.
After leaving his childhood home, Will embarks on a journey to become a true paladin while confronting demons, ancient dragons, and political conflicts across the continent. Although the series is more serious than That Time I Got Reincarnated as a Slime, both anime place tremendous emphasis on world-building, meaningful relationships, and protagonists who inspire loyalty through integrity instead of fear. Fans looking for a thoughtful fantasy with emotional depth will find plenty to admire here.
11
Tsukimichi: Moonlit Fantasy (2021)
Based on the Light Novel Written by Kei Azumi and Illustrated by Mitsuaki Matsumoto.
In Tsukimichi, Makoto Misumi tries to make a place for himself in his new reality after being rejected by the goddess who summoned him and threw him into the wasteland where he meets various non-human races, each offering a unique perspective on the world and helping build Makoto’s role in it. Makoto ends up becoming a powerful figure and finding companions, Tomoe and Mio, who follow him out of respect and admiration, an aspect also developed in That Time I Got Reincarnated As A Slime, where Rimuru seeks allies.
Although Rimuru doesn’t struggle with his appearance like Makoto, as he has good looks despite being a slime, they share similarities as they are both overpowered in their new worlds, build their own nations, and also ally with a dragon. Makoto makes a contract with Tomoe, while Rimuru befriends Veldora. Both anime also strike the perfect balance between comedy and action, with their unique quirkiness and stunning battles while focusing more on a world-building narrative, showing more of the political aspects of their kingdoms.
