Btooom! is a tense, high-stakes survival thriller that drops its characters into a deadly game where the only way out is to kill. The story follows Ryouta Sakamoto, a 22-year-old NEET who is one of the world’s top players of the video game “Btooom!” He is suddenly abducted and stranded on a deserted island, where he discovers that the game has become real—he must use bombs called “BIM” to fight against other players in a brutal battle royale where the winner earns the right to leave.
The series is defined by its core themes: a power system rooted in skill, strategy, and psychological manipulation, where the ability to read opponents and adapt is more important than raw strength. Ryouta is a quintessential underdog—a socially isolated gamer who must overcome his own insecurities and learn to trust others in order to survive. Btooom! masterfully subverts expectations by presenting what appears to be a simple death game and instead delivering a complex, character-driven exploration of trust, betrayal, and the moral compromises required for survival. It is a series that understands the psychological toll of violence.
For fans of Btooom!, finding similar anime can be a challenge. The series occupies a unique space—part battle royale, part psychological thriller, part survival drama. Yet, many underrated series share its core DNA: a focus on a deadly game with high stakes, an exploration of the psychological and moral complexities of survival, and a protagonist who is an underdog forced to fight for their life. These shows deserve far more attention for their tension, their character development, and their refusal to provide easy answers.
Here are 15 underrated anime that capture the spirit of Btooom!.
1. Deadman Wonderland (2011)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.2
- Episodes: 12
- Studio: Manglobe
- Notable Staff: Based on the manga by Jinsei Kataoka and Kazuma Kondou.
Plot Summary: Ganta Igarashi is falsely accused of massacring his classmates and is sent to Deadman Wonderland, a privatized prison that doubles as a theme park. He discovers that he is a “Deadman,” an inmate with a unique blood-based power, and must fight in gladiatorial battles to survive.
*Similarities to Btooom!:* Both are about a protagonist who is thrust into a brutal, high-stakes survival scenario where they must use their unique abilities to fight against other participants. The focus is on the psychological toll of violence and the struggle to maintain one’s humanity in a dehumanizing environment. The series is dark, violent, and full of suspense.
2. Battle Royale (2000)
- Streaming Availability: Not currently available on major platforms.
- Rating: MAL: 6.9
- Episodes: 1 (Film)
- Studio: Toei Animation
- Notable Staff: Based on the novel by Koushun Takami.
Plot Summary: In a dystopian future, a class of high school students is forced to participate in a government-mandated battle royale on a deserted island. They must kill each other until only one survivor remains.
*Similarities to Btooom!:* Both are about a group of people who are forced to fight to the death in a controlled environment. The focus is on the psychological breakdown of the characters and the moral compromises required for survival. The story explores themes of trust, betrayal, and the nature of human violence.
3. Future Diary (Mirai Nikki) (2011)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.6
- Episodes: 26
- Studio: asread.
- Notable Staff: Based on the manga by Sakae Esuno.
Plot Summary: Yukiteru Amano, a lonely boy, is thrust into a battle royale where participants use “Future Diaries” to predict the future. He must ally with Yuno Gasai, a girl who is obsessed with him, to survive and become the next god of time and space.
*Similarities to Btooom!:* Both are death game anime where the protagonist must use strategy, intelligence, and the help of allies to survive against other players with unique abilities. The focus is on the psychological toll of the game and the difficulty of trusting others. The series is known for its intense action and its exploration of obsession and madness.
4. The Future Diary: Redial (2013)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.3
- Episodes: 1 (OVA)
- Studio: asread.
- Notable Staff: Based on the manga by Sakae Esuno.
Plot Summary: An OVA sequel to Future Diary that provides an alternate ending and additional closure for the characters. It explores the aftermath of the battle royale and the consequences of Yukiteru’s choices.
*Similarities to Btooom!:* As a direct continuation of Future Diary, this OVA shares the same themes of survival, trust, and the psychological consequences of violence. It is underrated because it is often overlooked by fans of the main series, but it provides a satisfying conclusion.
5. Gantz (2004)
- Streaming Availability: Crunchyroll
- Rating: MAL: 7.0
- Episodes: 13 (Season 1)
- Studio: Gonzo
- Notable Staff: Based on the manga by Hiroya Oku.
Plot Summary: After dying in a train accident, Kei Kurono and Masaru Kato are resurrected by a mysterious black sphere called “Gantz.” They are forced to participate in violent missions, hunting down aliens and criminals in a deadly game where death is permanent.
*Similarities to Btooom!:* Both are about ordinary people who are forced into a deadly game by a mysterious force. The focus is on the psychological toll of violence and the struggle to survive in a world where death is always imminent. The series is dark, gritty, and unflinching in its portrayal of human nature.
6. Kaiji: Ultimate Survivor (2007)
- Streaming Availability: Crunchyroll
- Rating: MAL: 8.2
- Episodes: 26 (Season 1)
- Studio: Madhouse
- Notable Staff: Based on the manga by Nobuyuki Fukumoto.
Plot Summary: Kaiji Itou, a young man drowning in debt, is offered a chance to clear his debts by participating in a series of high-stakes gambling games. He must use his wits and psychological insight to survive against opponents who are just as desperate as he is.
*Similarities to Btooom!:* Both are about an underdog who must use strategy, intelligence, and psychological manipulation to survive in high-stakes situations. The focus is on the mental and emotional toll of the games. The series is a masterclass in suspense and psychological tension.
7. Eden of the East (2009)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.7
- Episodes: 11
- Studio: Production I.G.
- Notable Staff: Directed by Kenji Kamiyama.
Plot Summary: Akira Takizawa wakes up in front of the White House with no memories, holding a mysterious phone that gives him access to a vast amount of money. He discovers that he is part of a game where twelve individuals are tasked with “saving” Japan.
*Similarities to Btooom!:* Both are about a protagonist who is thrust into a high-stakes game with a mysterious purpose. The focus is on the mystery and the psychological toll of the game. The series is a thoughtful, intelligent thriller that explores themes of identity, memory, and social responsibility.
8. The Ones Within (Nakanohito Genome) (2019)
- Streaming Availability: Crunchyroll
- Rating: MAL: 6.7
- Episodes: 12
- Studio: Silver Link
- Notable Staff: Based on the manga by Osora.
Plot Summary: A group of popular streamers is kidnapped and taken to a mysterious facility where they are forced to participate in deadly games for the entertainment of an unseen audience. They must work together to survive and uncover the truth.
*Similarities to Btooom!:* Both are about a group of people who are forced to participate in deadly games for the entertainment of others. The focus is on the psychological toll of the games and the importance of trust and cooperation. The series is a tense, suspenseful thriller with a modern twist.
9. Sword Art Online (2012)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.2
- Episodes: 25 (Season 1)
- Studio: A-1 Pictures
- Notable Staff: Based on the light novel series by Reki Kawahara.
Plot Summary: Ten thousand players are trapped in a virtual reality MMORPG where death in the game means death in real life. Kirito, a solo player, must fight to clear the game and escape.
*Similarities to Btooom!:* Both are about a protagonist who is trapped in a game where death is real, and must use their skills and strategy to survive. The focus is on the psychological toll of the game and the bonds formed between players. The series is a landmark of the isekai genre.
10. Darwin’s Game (2020)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.2
- Episodes: 11
- Studio: Nexus
- Notable Staff: Based on the manga by FLIPFLOPs.
Plot Summary: Kaname Sudou is drawn into “Darwin’s Game,” a mobile game that turns out to be a real-life battle royale where players fight using supernatural abilities called “Sigils.” He must survive and uncover the secrets of the game.
*Similarities to Btooom!:* Both are about a protagonist who is drawn into a deadly game that blurs the line between the virtual and the real. The focus is on the psychological and moral complexities of survival. The series is a fast-paced, action-packed thriller with a similar focus on strategy and adaptation.
11. Juuni Taisen: Zodiac War (2017)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 6.6
- Episodes: 12
- Studio: Graphinica
- Notable Staff: Based on the light novel series by Nisio Isin.
Plot Summary: Twelve warriors, each representing a zodiac sign, are forced to fight to the death in a battle royale. The winner will be granted a single wish.
*Similarities to Btooom!:* Both are battle royale anime where a group of individuals with unique abilities must fight to the death. The focus is on the psychological and strategic aspects of the conflict. The series is a dark, stylish, and often brutal exploration of human nature.
12. Gunslinger Girl (2003)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.4
- Episodes: 13 (Season 1)
- Studio: Madhouse
- Notable Staff: Based on the manga by Yu Aida.
Plot Summary: A secret government agency takes young girls and transforms them into cybernetic assassins. Each girl is paired with an adult handler, and together they carry out missions of assassination while struggling with their eroding memories.
*Similarities to Btooom!:* Both are about individuals who are forced into violent situations by powerful organizations and must fight to survive. The focus is on the psychological toll of violence and the moral complexities of their situation. The series is a quiet, melancholic exploration of exploitation and the loss of innocence.
13. Mirai Nikki: Another World (2012)
- Streaming Availability: Not currently available on major platforms.
- Rating: MAL: 6.5
- Episodes: 1 (Special)
- Studio: asread.
- Notable Staff: Based on the manga by Sakae Esuno.
Plot Summary: A live-action special that adapts the story of Future Diary in a condensed format. It provides an alternative take on the battle royale and the relationship between Yukiteru and Yuno.
*Similarities to Btooom!:* As an adaptation of Future Diary, this special shares the same themes of survival, trust, and the psychological consequences of violence. It is underrated because it is a live-action adaptation that is often overlooked by anime fans.
14. The Law of Ueki (2005)
- Streaming Availability: Crunchyroll
- Rating: MAL: 7.4
- Episodes: 51
- Studio: Studio Deen
- Notable Staff: Based on the manga by Tsubasa Fukuchi.
Plot Summary: Kosuke Ueki, a middle school student, is given the power to turn trash into trees. He is chosen to participate in a tournament where the winner will receive a “blank talent” and become the next god.
*Similarities to Btooom!:* Both are about a protagonist who is given a unique ability and forced to compete in a tournament against other participants with their own powers. The focus is on the strategic and psychological aspects of the competition. The series is a classic shonen battle anime with a creative power system.
15. King’s Game (Ousama Game) (2017)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 5.5
- Episodes: 12
- Studio: Seven
- Notable Staff: Based on the novel series by Nobuaki Kanazawa.
Plot Summary: A class of high school students is forced to participate in a deadly game where they must obey the orders of a mysterious “King.” Failure to comply results in death.
*Similarities to Btooom!:* Both are about a group of people who are forced to participate in a deadly game with strict rules. The focus is on the psychological breakdown of the characters and the moral compromises required for survival. The series is a dark, suspenseful thriller.
Why These Anime Work for Btooom! Fans
Fans of Btooom! are drawn to stories that are tense, suspenseful, and psychologically complex. They appreciate a narrative that focuses on the moral and emotional consequences of violence, and they are invested in underdog protagonists who must use their intelligence and strategy to survive. They are not looking for simple action or power fantasies, but for stories that make them think about the nature of survival, trust, and human nature.
The anime listed above all share this fundamental DNA:
- The Deadly Game: Whether it is the BIM battles of Btooom!, the gladiatorial combat of Deadman Wonderland, or the battle royale of Future Diary, these series understand that the most compelling conflicts are those with the highest stakes. The characters are forced to confront their own mortality and the value of their lives.
- The Underdog Survivor: The protagonists are not heroes. They are ordinary people who are thrust into extraordinary circumstances and must find the strength to survive. Their greatest weapons are not their powers, but their intelligence, their adaptability, and their will to live.
- Subversion of the Action Genre: These series use the framework of the action and thriller genres to explore deeper psychological and moral questions. They understand that the most important battles are not fought with weapons, but within the human heart.
These 15 anime, like Btooom!, are not afraid to look into the darkness. They are underrated gems that offer a tense, thought-provoking, and deeply engaging experience for viewers who are looking for more than just mindless action.
