Tanjiro Kamado and Members of the Demon Slayer Corps, along with Nezuko Kamado, Arrive in Mars Games’ Popular City-Builder! A Collaboration Event will be Held on iOS and Android this September
Oakland, Calif. Sept. 1, 2026 – Mars Games, publisher of the hit mobile casual isekai city-building sim Isekai: Slow Life, today announced a collaboration event with Demon Slayer: Kimetsu no Yaiba, the internationally acclaimed anime and manga series. The latest in a series of anime crossovers for Isekai: Slow Life, the “Isekai Demon Hunter Arc” event kicks off today through Sept. 30, 2026 on iOS and Android devices.
Players will have access to six fan-favorite Demon Slayer characters in the game’s charming Isekai world:
- Tanjiro Kamado – A kind-hearted boy, who joins the Demon Slayer Corps to turn his younger sister back into a human. He uses the Water Breathing technique as well as the Hinokami Kagura, and has an excellent sense of smell.
- Nezuko Kamado – Tanjiro’s younger sister, who has been turned into a demon. Thanks to both Urokodaki’s hypnotic suggestion and her own willpower, she fights to protect humans. After conquering sunlight, she is able to be active during the daytime.
- Zenitsu Agatsuma – A swordsman in the Demon Slayer Corps and one of Tanjiro’s peers. Wielder of the Thunder Breathing technique. He is usually very timid, but when he’s extremely terrified, he blacks out and enters a trance demonstrating his true ability. He has a keen sense of hearing and loves girls.
- Inosuke Hashibira – A swordsman in the Demon Slayer Corps and one of Tanjiro’s peers. He is combative and loves to rush headfirst into battle. He uses the Beast Breathing technique, and always wears a boar mask over his head. Because he was raised in the mountains, he has razor-sharp intuition and is highly perceptive.
- Giyu Tomioka – A member of the Demon Slayer Corps’ highest-ranking swordsmen, the Hashira. The Water Hashira. He believed that he was not worthy of being a Hashira, however, he remembers the hopes his friend, Sabito, instilled in him and is determined to carry it through.
- Shinobu Kocho – A member of the Demon Slayer Corps’ highest-ranking swordsmen, the Hashira. The Insect Hashira. Has exceptional knowledge of medicine and fights using a special poison that can defeat demons.
While the Isekai Demon Hunter Arc collaboration runs from Sept. 1 through 30, the event is available for 21 days on existing servers. For new servers launched during the event period (for example, a server opened on Sept. 22), the collaboration remains available through Sept. 30, 2026. Players select a stage, encounter demons, and battle using a Match-3 combat system then use their spoils to upgrade characters and clear increasingly difficult stages culminating in a final boss battle. Along the way, players can level the characters to earn exclusive art, as well as dynamic avatars, free and paid emojis, new artifacts, and more.
In Isekai: Slow Life, players experience a captivating world as a walking mushroom. This cozy isekai city-building sim immerses players in a harmonious world where different races live side-by-side, often joining the player to build and manage a village. Along the way, maidens of different races await the player, ready to spend their days relaxing together in this charming new world.
Isekai: Slow Life is a Free-to-play mobile game with in-app purchase options that launched in August 2023. The title is available via App Store and Google Play Store. More information is available on the game’s official site.
About Demon Slayer: Kimetsu no Yaiba
This title is adapted from the manga series by Koyoharu Gotouge. Published under Shueisha’s Jump Comics imprint, the manga’s Volumes 1–23 have surpassed 220 million cumulative copies in global circulation. The animated adaptation is produced by ufotable.
Featuring a poignant story of humans and demons, thrilling sword combat sequences, captivating characters, and lighthearted comedic moments, the franchise has garnered massive popularity across the globe.
About Mars Games
Established in 2018, Mars Games is a mobile game company with a goal of bringing engaging, meaningful games to the global market. Comprised of industry veterans with experience across game development, distribution and marketing, we pride ourselves on creating a space where employees and partners are encouraged to be their authentic selves, be collaborative, be inquisitive and seek answers to achieve goals.
