i don't know what has happened to me but I can't seem to stop watching and reading isekia shows and manga. Like the plot doesn't even matter anymore, they all blend together... so here are some of them I've watched/read.

1. That time I got reincarnated as a slime

13 episodes (manga: vol10+, ch 51+)
Synopsis:
Mikami's middle age hasn't gone as he planned: He never found a girlfriend, he got stuck in a dead-end job, and he was abruptly stabbed to death in the street at 37. So when he wakes up in a new world straight out of a fantasy RPG, he's disappointed but not exactly surprised to find that he's not a knight or a wizard but a blind slime demon. But there are chances for even a slime to become a hero ...
Authors note: It's simple but good 👍👌
2. Overlord

3 seasons
Synopsis:
What do you do when your favorite game shuts down? Momonga decided to stay logged in right up until the very end. But when the servers go dark, he finds himself transported into the game world--and he's been transformed into his skeletal avatar from the game, awesome magical powers included! But what if he's the villain of his own story?

3. Solo leveling

Ch: 53+
Synopsis:
10 years ago, after "the Gate" that connected the real world with the monster world opened. Some of the ordinary, everyday people received the power to hunt monsters within the Gate. They are known as "Hunters". However, not all Hunters are powerful. My name is Sung Jin-Woo, an E-rank Hunter. I'm someone who has to risk his life in the lowliest of dungeons, the "World's Weakest". Having no skills whatsoever to display, I barely earned the required money by fighting in low-leveled dungeons... at least until I found a hidden dungeon with the hardest difficulty within the D-rank dungeons! In the end, as I was accepting death, I suddenly received a strange power, a quest log that only I could see, a secret to leveling up that only I know about! If I trained in accordance with my quests and hunted monsters, my level would rise. Changing from the weakest Hunter to the strongest S-rank Hunter!

Authors note: I really like how even though he starts off weak he slowly levels up until he's just badass. I highly recommend this manga to anyone who likes action, fantasy and the isekai genre in general(even if it's not completely one) 💯👌

4. daughter of the emperor

Vol: 5+; Ch: 138+
Synopsis:
Ariadna Lereg Ilestri Pre Agrigent. And so my life begins with this ridiculously long name, born to royalty and the center of attention — all because of one dangerous man; the veritably insane tyrant king, ruthless conqueror of ten empires, nightmare of all continents... and my father?! Will I be able to survive this maniac?

5. Re:zero

25 episodes
Synopsis: Natsuki Subaru, an ordinary high school student, is on his way home from the convenience store when he finds himself transported to another world. As he's lost and confused in a new world where he doesn't even know left from right, the only person to reach out to him was a beautiful girl with silver hair. Determined to repay her somehow for saving him from his own despair, Subaru agrees to help the girl find something she's looking for...

6. Suddenly Became A Princess One Day

Ch:9+
Synopsis:
The beautiful Athanasia was killed at the hands of her own biological father, Claude de Alger Obelia, the cold-blooded emperor! It's just a silly bedtime story... until one woman wakes up to suddenly find she's become that unfortunate princess! She needs a plan to survive her doomed fate, and time is running out. Will she go with Plan A, live as quietly as possible without being noticed by the infamous emperor? Plan B, collect enough money to escape the palace? Or will she be stuck with plan C, sweet-talking her way into her father's good graces?!

Authors note: so far so good

7. So I'm a Spider, So What?
Alt: Kumo Desu ga, Nani ka?

Vol:5 ch:33.1+
Synopsis:
I was your average, everyday high school girl, but now I've been reborn in a magical world...as a spider?! Wait-this isn't how these stories are supposed to go! Can I get a do-over? ...No? But how am I supposed to survive in this big, scary dungeon as one of the weakest monsters? It's "every spider for herself " in here! I gotta figure out the rules to this QUICK, or I'll be kissing my short second life good-bye...

Authors note: Not you typical isekai/RPG where the MC goes to a fantasy world and becomes OP and gets a harem... it's a nice change
8. Re:monster

Vol:4, ch:48+
Synopsis:
Tomokui Kanata has suffered an early death, but his adventures are far from over. He is reborn into a fantastical world of swords and magic-- as a lowly goblin! Not content to let this stop him, the now renamed "Rou" uses his new physical abilities and his old memories to plow ahead in a world where consuming other creatures allows him to acquire their strengths and powers.

9. A Returner's Magic Should Be Special

Ch:37+

Synopsis: "Now that I'm back, I won't allow my loved ones to die again!"
The Shadow Labyrinth - the most catastrophic existence humanity has faced in history.
Desir Arman is one of the six remaining survivors of mankind within it.
The six attempt to clear the final level of the labyrinth but ultimately fail, and the world comes to an end.
However - when Desir thought he would meet his demise, what is revealed before him is the world... thirteen years ago?!
Desir is returned to the past, back to the time when he enrolled at the nation's finest magic academy - Havrion. He is reunited with his precious friends, and is prepared to change the past to save the world and his loved ones...!
Three years remaining before the emergence of the Shadow World!
Change the past and gather powerful comrades to save mankind!

Authors note: It kind of gives me the same feel as solo leveling as in there considered weak by everyone else but with determination they get stronger. However, its still unique.

10. The gamer

ch: 256
Synopsis:
Jee-Han loves gaming more than anything, but it still comes as a shock when one day, he suddenly acquires a mysterious power that superimposes RPG characteristics onto the real world! Tasks like going to the store for his mother initiate experience-earning quests, and everyone around the boy display levels and stats above their heads. But what starts as a mild curiosity suddenly becomes all the more real, when Jee-Han discovers that there's monsters to be killed, special skills to be earned, and others who have similar abilities!
Authors note: really liked the concept and you can also read it on webtoon

11. The Legendary Moonlight Sculptor

Ch:117+
Synopsis:
The man forsaken by the world, the man a slave to money and the man known as the legendary God of War in the highly popular MMORPG Continent of Magic. With the coming of age, he decides to say goodbye, but the feeble attempt to earn a little something for his time and effort ripples into an effect none could ever have imagined. Through a series of coincidences, his legendary avatar is sold for 3.1 billion won ($2.7 million), bringing great joy to him, only to plunge him into despair at losing almost all of it to vicious loan sharks. With revelation of money through gaming, he rises from the abyss with new found resolve and steps forward into the new age of games led by the first ever Virtual Reality MMORPG, Royal Road. This is the legend of Lee Hyun on his path to becoming Emperor with only his family loving heart, his boundless desire for money, his unexpected mind, his diligently forged body and the talent of hard work backing him.

12. Log on horizon

2 seasons

Synopsis:
With over 20 million players worldwide, Elder Tale is one of the hottest online RPGs. At least, it used to be only a game, until the fateful day that tens of thousands of players became stuck in the virtual world, unable to log out. For these would-be knights, healers and magicians, Elder Tale is no longer a hobby, it's a reality, complete with tasteless in-game food, revivals upon death, and boring NPC conversations! With no other options than to accept their fates, the analytical Shiroe, perverted-and-proud Naotsugu, tiny and adorable Akatsuki and other new friends must adjust to their new lives in Elder Tale, avoiding player killers and monsters along the way!

13. Is it Wrong to Try to Pick Up Girls in a Dungeon?

13 Episodes
Synopsis:
Is It Wrong to Try and Pick Up Girls in a Dungeon? is set in the world of Orario, where adventurers band together and look for treasures in an underground labyrinth known as Dungeon. However, for Bell Cranel, fame and riches are secondary to what he wants to find the most: girls. He soon finds out though, that anything can happen in Dungeon, and winds up being the damsel in distress instead!

14. No game no life

1 season and a movie

Synopsis:
An urban legend states that those exceptionally gifted at gaming will be sent a special game invitation, and the winners of the challenge will be whisked away to another world. When Sora and Shiro, two hikikomori NEETs who happen to be both siblings and notorious gamers, receive this invitation, they defeat it with ease. And like the legends tell, they're transported to another world where conflicts, peoples' lives and even country borders are decided by competitions and games. Always up for a challenge, the pair quickly take on the obstacles that come their way, whether it be restoring lowly humanity's good name compared with the other races or helping influence who will become the next king.

Author note: very aesthetically pleasing

15. Sword art online

2 seasons, a movie and some other stuff (idk there's sao Alternative:Gun Gale Online (which I actually really liked) and Alicization)
Synopsis:
The year is 2022, and gamers have lined up on launch day for Sword Art Online, a hotly-anticipated MMORPG that lets players connect to an immersive virtual reality world with special helmets called Nerve Gear. Kirito is one such gamer who's eager to jump back into action, having spent a great deal of time as a beta tester, and quickly becomes friends with newbie warrior Klein. But soon, Sword Art Online's 10,000 players discover that not only are they unable to log out, the only way they can return to their physical bodies is by beating the 100-level tower's final boss - that is, if their HP doesn't drop to zero first, for death in the game means death in the real world. Now, with no one else to turn to, Kirito and the other participants must survive the game as best they can – some forming guilds, others ruthlessly leaving their peers behind, and many tragically falling by the wayside or to the merciless monsters populating the lands...
Authors note: honesty could only watch the first season. I thought it was really good a first but then the romance kind of ruined it. Really enjoyed sao alternative:gun gale online though👌

16. They Say I Was Born a King's Daughter

3 parts ch:123+

Synopsis:
A murder victim is reborn, fully conscious of her past life, as a king's unwanted daughter in a new world where despite the end of all wars and advancement of science, misogyny reigns.

Authors note: similar to daughter of the emperor.
17. The Rising of the Shield Hero

Vol: 12+; Ch: 50+ (The anime is currently being released)

Synopsis:
Naofumi Iwatani, an uncharismatic Otaku who spends his days on games and manga, suddenly finds himself summoned to a parallel universe! He discovers he is one of four heroes equipped with legendary weapons and tasked with saving the world from its prophesied destruction. As the Shield Hero, the weakest of the heroes, all is not as it seems. Naofumi is soon alone, penniless, and betrayed. With no one to turn to, and nowhere to run, he is left with only his shield. Now, Naofumi must rise to become the legendary Shield Hero and save the world

18. Tales of Demons and Gods

Ch:206+
Synopsis:
Nie Li, the strongest Demon Spiritist in his past life standing at the pinnacle of the martial world however, he lost his life during the battle with Sage Emperor and the six deity ranked beast, his soul was then reborn back in time back to when he is still 13. Although he?s the weakest in his class with the lowest talent at only Red soul realm, but with the aid of the vast knowledge which he accumulated from his previous life, he trained faster then anyone.
Trying to protect the city which in the coming future was being assaulted by beast and ended up being destroyed as well as protecting his lover, friends and family who died by the beast assault. And to destroy the Sacred family whom abandon their duty and betrayed city in his past life.

Authors note: 5⭐️

Some others:
Anime
•isekai maou to shoukan shoujo
•goblin slayer (warning the first episode continues a rape scene)
•Youjo Senki
•Death March to the Parallel World Rhapsody
•KonoSuba – God's blessing on this wonderful world!!
•Grimgar of Fantasy and Ash

Manga
•The Reason Why Raeliana Ended up at the Duke's Mansion
•Miss Not-So Sidekick
•Reminiscence Adonis
•Otome Game no Hametsu Flag shika nai Akuyaku Reijou ni Tensei shite shimatta... (similar to miss no.. and the reason wh..)
•The beginning after the end
•Goddess Creation System
•Devil Down Under
•Volcanic Age
•Skeleton Soldier (Skeleton Soldier Couldn't Protect the Dungeon)

Again thanks for reading and leave your own recommendations in the comments ❤️