The 15 Best Isekai Anime of All Time
From Re:Zero to Mushoku Tensei, here are the best isekai anime ever — the must-watch other-world adventures for every…
転生したらスライムだった件
Cover: via AniList · © 8-bit
If you have ever wondered what That Time I Got Reincarnated as a Slime is about, the pitch sounds almost like a joke: a thirty-something office worker is stabbed to death on a mundane Tokyo street and wakes up in a fantasy world reborn as the weakest monster imaginable, a gooey blue slime. That gag is the doorway, not the destination. Reborn as Rimuru Tempest, our hero quickly discovers that a slime can absorb the skills of everything it eats, and what begins as bewildered survival in a cave grows into something far bigger. Adapted by studio 8-bit and first airing in 2018, this 24-episode series turns a silly premise into one of the most beloved isekai stories of its era.
What makes it stand out is how much heart sits underneath the power fantasy. Yes, Rimuru gets absurdly strong, but the show is less interested in flexing and more in the quiet, surprisingly moving work of building a home for outcasts. Goblins, ogres, and dire wolves who would be faceless enemies elsewhere become neighbors, and characters like the fierce dragon-child Milim Nava and the fearsome, devoted Shion give the growing nation its color and its stakes. The 8-bit animation keeps the monsters expressive and the fights readable, while the comedy, warmth, and slow-burn worldbuilding earn its strong reputation among fans, reflected in an AniList score around 80.
So is That Time I Got Reincarnated as a Slime worth watching? If you want an isekai that trades grimdark angst for optimism, competence, and genuine camaraderie, it absolutely is. Expect a comfortable, confident pace: early episodes are cozy and low-stakes as Rimuru learns the rules of this world, before the scope widens toward diplomacy, war, and the messy responsibility of leadership. The tone balances laugh-out-loud gags with sudden emotional gut-punches, and the fantasy politics reward viewers who enjoy watching a kingdom take shape from the ground up.
This first season is ideal for newcomers curious about isekai and veterans tired of joyless power fantasies alike. Blending Action, Adventure, Comedy, and Fantasy, it works whether you want easy weekend comfort viewing or a genuinely engrossing rise-to-power saga. Wholesome without being toothless and epic without losing its sense of humor, it remains one of the easiest entry points into the genre and a rewarding binge from its very first slippery, slimy moment.
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The main leads of the series.
Beloved side characters and major villains — the cast audiences love.
The wider cast — side, minor and recurring characters.
Shizu
Souei
Ranga
Gobta
Daikenja
Ramiris
Hakurou
Treyni
Gabiru
Chloe Aubert
Rigurd
Souka
Geld
Ellen
Alice Rondo
Kaijin
Rigur
Karion
Youm Farmenas
Laplace
Yuuki Kagurazaka
Gazel Dwargo
Ryouta Sekiguchi
Myrd
Tear
Kenya Misaki
Kurobee
Clayman
Vesta
Garde-Myourmiles
Gido
Fuze
Gale Gibson
Phobio
Garm
Dord
Kaval
Trya
Abil
Yashichi
Tamura
Kakushin
Sukerou
Footman
Kaidou
Gelmud
Velyard
Orthos
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