You recommend an anime where the male protagonist enters the game world with a helmet, but cannot exit. He must clear the game to return to real life.

😋I recommend "The Strongest Mortal in Online Games Myths" to you. This novel described how the protagonist accidentally obtained a mythical version of the online game helmet from the Heavenly Court. After wearing the helmet, he walked to the peak of the strongest mortal's life and became a hero in the myths. He met with the wind and clouds and took in many beautiful women as his pets. I hope you like this fairy's recommendation. Muah ~😗

There are many TV series or cartoons where the protagonist enters the game world. The following are some examples: 1 Gamers: This is an animated film produced by Streaming that tells the story of a group of gamers who are trapped in the game and need to constantly explore the game world and find a way to go home. 2. Star Trek series: Although Star Trek is a fictional sci-fi TV series, it also has many plots that involve the virtual world in the game, such as the captain's adventures in virtual space. 3. Doctor Who series: The main character of this TV series is a doctor who travels through time. He often takes risks in the game, such as fighting against evil forces and exploring the secrets of time. Dragon Quest series: This series of games has become a cultural phenomenon and has spawned many cartoons, TV series, and movies. Some of these works also involved adventure plots in the game. These are just a small number of examples. In fact, many TV series and cartoons involve the plot of the game world, which is also one of the works that many readers and viewers like.

It might not be exactly what you want, but I would recommend a novel that is most relevant to your description."The Manga Character Collection Manual" is a novel about a mysterious world written by the author's favorite Akita Inu. The general plot of this novel is as follows: Chen Feng was obsessed with anime. When he saw Rem get hurt, he threw his phone in a fit of anger. He bought a phone and accidentally obtained a system. "If you want to get the characters in the anime, then come and collect them." Chen Feng began to enter the anime world and began to intertwine with the real world, creating a world that belonged only to him. ---------------------------- "The Quick Jump Animation Mission" was a sci-fi space-time travel novel written by Viola Linglong. The general plot of the novel was: Traveling through the animated world… Randomly becoming all kinds of cute pets, protagonists, passersby... There's nothing you can't meet, only something you can't think of… This mission was completed! They were about to arrive at the next scene. Mission failed? It seemed that only a handsome man could complete the mission… Don't miss it! Big friends and small friends, please take a look! Save the animation world and bring you a different experience of animation… Memories Kill, let's go~ Please take your favorite cutie away, the bookshelf will serve you! Muah~ ---------------------------- The Pet Heavens Simulation was a light novel, a derivative doujinshi novel, written by the author, Extreme Frozen Cat. The general plot of the novel was: Black fog descended on the city, and mutated beasts broke through the dimensions. Animals and plants, mechanical bodies, netherworld, nature, mountains, rivers, and lake soul essences... All of them could become pets. This was a foreign world where humans awakened their beast-taming talents, contracted pets, and fought against the beast tide together. He had transmigrated to the young Jiang Ling and awakened the [Pet Heavens Simulator]. Unlocking your pets: Naruto, One Piece, Dragon Ball, Pokémon, etc., unlimited simulation dungeons. From then on, he embarked on the path of an indecent beastmaster. Jiang Ling: "If the world doesn't have the fire to dispel the black fog, everyone should burn yourselves…"<br><br> Passerby: "Life should be like a candle, lighting up the darkness for everyone!" Jiang Ling: "No, no, no. I'll set up the wok. Everyone, let's barbecue the mutated beasts in the black fog." Passersby: "Tagged: pets, familiars, comics, gods, Naruto, pirates, Pokémon." ---------------------------- "The Strongest Creature on Earth" was a virtual online game novel written by the author, Sad Abalone. The general plot of the novel was: In this otaku online game named 'The Strongest Creature on Earth', the young man named Makoto Ito began to fight against the most powerful individuals in the world! Thus, the complicated plot unfolded-Demon King? Savior? Alchemist? These seemed to belong to the same system, right? A demonic spirit? Summoned beast? Digimon? Wait a minute, the situation was starting to get a little strange…Death God battling the Heroic Spirit? Cutting Gundam with a chopper? Taking apart the Eva with his sister's hands? Hey, hey, isn't this completely off-line? What was that? After dying, he still had to join a terrorist organization in another world to fight against the gods? Was there a problem with this plot? In this virtual world that was completely formed by schools, time and space could no longer be an obstacle to stop the battle. Only strength and academic ability were the key to determining the outcome! ---------------------------- "Choosing Warriors in the Comic World" was a light novel written by Mei Linhei, a derivative Doujinshi novel. The general plot of the novel was: Uchiha Weasel looked at the pairs of kaleidoscopes in front of him and broke out in cold sweat. Ichigo Amagasaki looked at the bow in Yuriko Amagasaki's hand, unable to understand. ---------------------------- "Drawing Cards to Become a Hero in Cyber Punk" was a light novel by the author, CEO Kelda Duck. The general plot of the novel was: This is my turn! He drew the Genji card and transformed into a Mechanical Ninja to display the power of the Shimada family's Dragon God. He drew the Destruction Ball card and summoned a violent hamster to behave atrociously in other people's faces. He drew the Power Kid card and injected a brainless hormone, RUSHH. He drew the DVE card but he didn't draw it with a dark face. Then it was fine. This was the story of becoming a hero in the City of Darkness with the help of a hero's power. ---------------------------- "The Manga Artist in Doraemon" was a light novel by the author, I'm an alias. It was a derivative doujinshi novel. The general plot of this novel was: Lin Feng transmigrated to the world of Doraemon and became a transfer student with the same name. The movie's process: The Messenger of the Wind-Legend of the Sun King-Adventures in the Devil World-Iron Man Corps-Mermaid Sea Battle. ---------------------------- "Pure White Fantasy" was a light novel written by The Cat with a Slow Heart. It was a fantasy novel. The general plot of the novel was: After transmigrating into the princess's pet dog, he thought that he would be able to live happily in the palace for the rest of his life. He did not expect to be pulled off a cliff by the princess at the beginning of the game. The story was slow to heat up, fantastical, funny, and hot-blooded. The first volume was mainly about the story of the two elven sisters who had no choice but to fall into the boss's trap and were finally saved by the protagonist. If you want to watch a hot-blooded battle, please look for a book with a strong visual sense~ Our aim is to fight until the sky is dark and the earth is dark! ---------------------------- "Yu-Gi-Oh from Dueling City" was a light novel by the author, Lost Star. The plot of the novel was as follows: Time was the beginning of the Dueling City Competition. You Ling, who had accidentally transmigrated to the world of Yu-Gi-Oh, had originally planned to rely on the card sets of the advanced era to give the local duelists a little shock. Then, he would become the Dueling King and walk to the peak of his life. However, the scene in reality was slightly different from his expectations…Muto Game: I activated the magic card [True Red Eye Fusion] from my hand! Fuse [Black Magician] and [True Red-Eyed Black Dragon] in the deck and show yourself! The bond of friendship-Super Magicdragon Knight!" "Hmph!" You Ling, you're a third-rate dueling player with a second-rate deck. It seems that if I don't whip you with the name of complete defeat, you won't understand the fact that you can't win! Ritual Summoning, descend! Azure Eyed Chaos Dragon!" You Ling: "…Since you guys are doing this, then I don't intend to pretend to be a good person anymore! Release the three-body monster, summon it! Kami! "Travelling Bird with the Wind × Sky Dragon!" This book is also known as "OCG players don't die from slacking","Three or two things that I have to say to the sister card elves","Strong! He's really too strong! "In order to become the King of Duels, I joined the Villain Organization."<strong></strong><strong></strong><strong>"Playing cards, the protagonist will not lose, animation + OCG fusion world view, including the parallel world setting of the dark side of the movie."<strong></strong><strong>"Playing cards, duels, cards, OCG, Pearl Tears Elegy Clan, Tears Princess, Sublime Power, this card is fated with me." ---------------------------- "Scream!" Duelists!" This book was a light novel written by the author, Free Frog. It was a fantasy novel. The general plot of this novel was: [The new book "Card Era: Silver Dragon Descent" has been released! I hope everyone will support me!] You Shuo had transmigrated to Yu-Gi-Oh, so he had started his journey as a duelists! Muto Game: So it's this kind of combo!" [My Azure Eyed Ultimate Dragon actually!] "Oh no!" Looking at the duelists that he defeated one after another, You Shuo smiled brightly."A real duel is to bring glory to your opponent!"

The name you want is Attack on Titan.

There were many novels that allowed everyone to enter the game world, including Fierce Players, Everyone Entering the Game Era, Sequence Players, and so on. These novels described a scenario where everyone entered the dungeon world. Players could participate in the game with a sense of immersion and experience all kinds of exciting adventures and competitions. The settings and plots of these novels were very novel and fascinating.

The novel I recommend to you is " The Alien Universe's Animation Invasion." This book was about people entering various secret realms to capture the aborigines as pets, and the secret realms were all anime worlds. The male protagonist, Lin Luo, was a transmigrator who had been sent down by a god. He met all kinds of anime characters in the game world. I hope you like my recommendation.😗

😋I recommend [Online Game Super Helmet] to you! The male lead, Lu Feng, had a super helmet system that allowed him to enter the virtual game world. His ID in the game was called "Ring Finger". This book also has a variety of mysterious skills and missions waiting for you to discover! I hope you like this fairy's recommendation. Muah ~😗

I recommend the two novels," Movie Plot Shuttle Ring " and " Transdimensional Drawer." In both novels, the male lead received a ring that allowed him to travel between different worlds, including the anime world, movies, novels, games, and so on. " The Movie Plot Shuttle Ring " was a sci-fi novel that traveled through time and space, while " The Transdimensional Drawer " was an infinite novel. Both novels had different storylines and colorful worlds. They were worth reading. I hope you like my recommendation.

I recommend the novel,"Wear It Quickly and Perfectly" to you. The male protagonist accidentally entered the perfect game world of the female love game and needed to complete the task of conquering ten male protagonists. Among them were the loyal dog assassin and other boys. The male lead had the ability of an assassin. I hope this novel meets your needs. If you like it, don't forget to leave me a message.

There were many animes that depicted the protagonist entering a world of gambling. 1. The Apocalypse of Gambling: It tells the story of the adventures of the protagonist and his gambling partner in the mysterious world. 2. Gambling: The adventure story of the protagonist in the mysterious world of gambling. He must get rid of his past sins related to gambling. Gambling Revolution: It tells the story of the protagonist's struggle in the gambling world. He became a true leader through his own efforts and courage. 4 " The Gate of the Fate Stone ": The story of the protagonist and his gambling partner entering a gambling-related world through a mysterious experiment.