PC version of "Kaiju 8 The Game" launches today. Release of main story chapter 4, "London Defense Operation," featuring Chester Rockbourn and Shinomiya Kikoru.
Note: the original Japanese article can be found at:
https://www.4gamer.net/games/810/G081021/20251001032/
Editorial Department: Yonoshima | 2025/10/01 09:00 (UTC)
Akatsuki Games today (October 1, 2025) announced the launch of the “Kaiju No. 8 THE GAME” PC version on Steam, developed in collaboration with TOHO and Production I.G. The game is free to play with item-based monetization, and account synchronization between the PC and smartphone versions is supported.
Steam “Kaiju No. 8 THE GAME”
“Kaiju No. 8 THE GAME” is a command-based RPG based on the TV anime “Kaiju No. 8”, originally created by Naoya Matsumoto. Set in a world where monsters regularly threaten humanity, the game portrays intense battles between Japan Defense Force—where protagonist Hibiya Kafka is affiliated—and monstrous foes.
With the PC version launch, Main Story Chapter 4, titled “London Defense Operation,” has been released. In this chapter, Kafka, Sagan, and Yonogi Kikoru are dispatched to London due to activation of a dimensional gate. There, they join forces with CLOZER team member Chester Rockbourn to confront armored monsters attacking the city.
Additionally, a limited-time gacha festival featuring the new ★5 characters Chester Rockbourn and Kikoru is now underway. Chester is a support-type character who wields AR-Anorocock (Assault Rifle), while Kikoru is an attacker utilizing Fs-Magni (Gloves).
Official “Kaiju No. 8 THE GAME” Website
Download Page for “Kaiju No. 8 THE GAME”
Download Page for “Kaiju No. 8 THE GAME”
【Kaiju No. 8 THE GAME】Chapter 4 “London Defense Operation” Begins!
New ★5 Characters: [All-Round] Chester Rockbourn & [Inherited Feelings] Yonogi Kikoru Join the Battle!
The long-awaited PC (Steam) version is now finally available!
Based on Naoya Matsumoto’s popular manga series, “Kaiju No. 8,” serialized in Shueisha’s Shōnen Jump+ and surpassing 19 million copies sold domestically (including digital versions as of September 4, 2025), the anime adaptation has gained widespread popularity not only across Japan but also internationally—particularly in North America. The smartphone and PC game “Kaiju No. 8 THE GAME,” developed by a powerful team consisting of Akatsuki Games, TOHO, and Production I.G, brings this globally beloved franchise to life.
PC (Steam) Version Released
We are pleased to announce the official launch of the PC (Steam) version! Account synchronization between smartphone and PC versions is now supported.
※For details on account linking and transfer procedures, please refer to in-game announcements.
Main Story Chapter 4 “London Defense Operation” Now Live!
We have officially released Main Story Chapter 4: “London Defense Operation.”
Due to the activation of a dimensional gate, Kafka, Kikoru, and Sagan are dispatched to London. There, they meet up with CLOZER team member Chester Rockbourn and confront armored monsters ravaging the city. As attacks fail against their heavy armor, each fighter must adapt their tactics accordingly—while Kikoru draws strength from her father Yonogi Isamu’s legacy, stepping boldly into the heart of battle.
・Login Bonus for Chapter 4 Launch:
Log in during the event period to receive up to 10 Pickup Gacha Tickets.
Celebrating Chester & Kikoru’s Debut! Special Gacha Festival Live!
A special gacha festival is now underway featuring the new ★5 characters: [All-Round] Chester Rockbourn and [Inherited Feelings] Yonogi Kikoru.
During this event, for every 10 gacha pulls made three times (for a total of 30), you will receive one free gacha pull.
※The first single gacha pull does not count toward the required number; even if you perform 30 individual pulls, no bonus free pulls are granted.
※Each gacha’s 10-pull count is tracked separately—free gacha rewards cannot be obtained by combining different gacha counts.
New ★5 Character: [All-Round] Chester Rockbourn
With this update, the ★5 character [All-Round] Chester Rockbourn is now available in gacha. A composed and level-headed CLOZER team member with prior experience leading a special unit within Britain’s Defense Force, Chester excels across multiple weapon types and can adapt his tactics to any situation.
■ New ★5 Character
[All-Round] Chester Rockbourn (Optimal Weapon Type: Assault Rifle)
■ New ★5 Weapon
AR-Anorocock (Assault Rifle)
■ Character PV: [All-Round] Chester Rockbourn
https://youtu.be/Fp722V1KODo
■ Character Illustration
・ Character Story “Cheers in the Quiet Night” Unlocked!
On a quiet night in London, Chester meets up with Izumo Haruichi at a pub. Through casual conversations and interactions with his comrades, glimpses of his personal side—and past—emerge beyond the stoic image he shows on the battlefield. Discover the hidden depths behind this composed CLOZER team member.
New ★5 Character: [Inherited Feelings] Yonogi Kikoru
With this update, the ★5 character [Inherited Feelings] Yonogi Kikoru is now available in gacha. A suitable user of Dimensional Identification Monster Weapon (Dimension Numbers) 2, developed from material derived from Dimensional Identification Monster No. 2 from a parallel world. Kikoru wields her father Isamu’s inherited techniques with devastating power—her fierce offensive prowess on the battlefield is not to be missed.
■ New ★5 Character
[Inherited Feelings] Yonogi Kikoru (Optimal Weapon Type: Gloves)
■ New ★5 Weapon
Fs-Magni (Gloves)
■ Character PV: [Inherited Feelings] Yonogi Kikoru
https://youtu.be/dOZlPKVLtkQ
■ Character Illustration
・ Character Story “Connecting Feelings” Unlocked!
On a day off, Kikoru unexpectedly meets her peer Kafka at a family restaurant. Through casual conversation, the story unfolds about training to master Dimension Numbers 2 and confronting the legacy she inherited from her father. In pursuit of future goals with her friends, Kikoru takes another bold step forward.
Game Overview: “Kaiju No. 8 THE GAME”
・ Title: Kaiju No. 8 THE GAME
・ Concept & Production: Akatsuki Games Co., Ltd., TOHO Co., Ltd., Production I.G Inc.
・ Development & Operation: Akatsuki Games Co., Ltd.
・ Promotion Support: TOHO Co., Ltd., Production I.G Inc.
・ Distribution: Akatsuki Games Co., Ltd.
・ Platforms: App Store, Google Play, Steam
・ Languages Supported: Japanese, English, Traditional Chinese, Simplified Chinese, Korean, French
・ Pricing: Free-to-play (item-based monetization)
・ Copyright Notice:
(C) Defense Force Division 3 (C) Naoya Matsumoto / Shueisha
(C) Akatsuki Games Inc. / TOHO CO., LTD. / Production I.G
・ Official Game Website: https://kj8-thegame.com/
・ Official X (Twitter): https://x.com/Kj8_TheGame
・ Official YouTube Channel: https://www.youtube.com/@Kj8-TheGame
・ App Store: https://apps.apple.com/jp/app/kaiju-no-8-the-game/id6742088839
・ Google Play: https://play.google.com/store/apps/details?id=jp.aktsk.games.kaiju_no8_the_game
・ Steam: https://store.steampowered.com/app/3393070
Anime “Kaiju No. 8” Series Overview
The anime adaptation of the popular manga series “Kaiju No. 8,” created by Naoya Matsumoto and serialized in Shōnen Jump+ (Shueisha) since 2020, depicts intense battles between Japan Defense Force—formed to protect civilians from monsters that threaten everyday life—and massive monsters descending upon the world. The original manga series (16 volumes total) has surpassed 19 million copies sold domestically as of September 4, 2025.
The anime aired from April to June 2024 and achieved #1 ranking in daily charts on major video streaming platforms across Japan. Additionally, the first season’s compilation film / simultaneous release “Hokko’s Day Off” premiered in theaters starting March 28, 2025, generating significant excitement. On July 19, 2025, Season 2 began airing weekly on Saturdays at 11:00 PM across TBS network affiliates. Furthermore, with the broadcast of terrestrial TV episodes, real-time global livestreaming was available via the official X (Twitter) account for the series—receiving enthusiastic responses from fans worldwide.
・ Anime Official Website: https://kaiju-no8.net/
・ Anime Official X (Twitter): https://twitter.com/KaijuNo8_O