A blood-staked "Chinchiro" showdown. Deck-building roguelite Chinchiro game "Menherarium" releases demo on October 11th
Note: the original Japanese article can be found at:
https://www.4gamer.net/games/866/G086651/20251010028/
Editorial Department: Igarashi | 2025/10/10 10:00 (UTC)
Phoenixx today (October 10, 2025) announced that its upcoming title Menherarium will participate in Steam Next Fest, and revealed that the demo version will be released on October 11 at 0:00 JST, ahead of the festival.
This game is a deck-building roguelite where you battle against an “extremely emotionally unstable girl” in a blood-staked Chinchiro match. You must win continuously for seven days, meeting the daily score target set each day.
Surviving each day earns you coins redeemable at the shop. The store sells items that allow you to restore blood or even rewrite dice rolls—use these strategically to overcome the absurd rules she imposes.
The demo lets you experience the journey from meeting the unstable girl to entering her Chinchiro matches, as well as those “sweet few days” spent with her.
Alongside this announcement, a brand-new trailer introducing game content and a full-length PV featuring voice actress Yūko Natsuyoshi as the character have been released—be sure to check them out!
A blood-staked deck-building roguelite
Chinchiro game “Menherarium” demo available on Steam starting October 11 (Sat)
Survive a Chinchiro battle with cute yet terrifying Yūko Natsuyoshi as the emotionally unstable girl. Hear her voice firsthand in both the official PV and the demo.
Phoenixx Co., Ltd. (located in Musashino, Tokyo; President & CEO: Kazunori Sakamoto) has announced that its deck-building roguelite Chinchiro game Menherarium will participate in Steam Next Fest, taking place from October 14 to 21, 2025. Ahead of the festival, a demo version will be released on October 11 (Saturday), at 0:00 JST.
Demo page here:
https://store.steampowered.com/app/3487320/Menherarium_Demo/
Additionally, two new promotional videos for Menherarium have been released alongside this announcement. Be sure to experience the cuteness (and creepiness?) of the character brought to life by voice actress Yūko Natsuyoshi.
- PV (Menhera-chan version):
https://youtu.be/1LOQyKJfDlk
- PV (Steam Next Fest version):
https://youtu.be/zp5ZFLMF-2A
If you’re intrigued by the demo, please consider adding the game to your wishlist via the Steam page below:
https://store.steampowered.com/app/3394770/_/
Menherarium Demo Released on October 11, 2025 (Sat)!
…It seems the Menhera-chan can’t wait until Steam Next Fest.
Menherarium is a deck-building roguelite Chinchiro game where you must keep winning against an extremely emotionally unstable girl in blood-staked matches. Ahead of the official Steam Next Fest event from October 14 to 21, we’re releasing the demo version on October 11 (Saturday), at 0:00 JST.
Menhera-chan is waiting for you—please try the demo below!
https://store.steampowered.com/app/3487320/Menherarium_Demo/
The demo allows players to experience the journey from meeting Menhera-chan to entering Chinchiro matches, as well as those sweet few days spent with her.
Please make sure you don’t lose your life during these playable days.
● Check out the new trailer (Steam Next Fest version):
https://youtu.be/zp5ZFLMF-2A
Voice of Menhera-chan by Yūko Natsuyoshi!
The emotionally expressive voice of Menhera-chan is provided by voice actress Yūko Natsuyoshi. Even in unfair, blood-staked Chinchiro battles, you’ll find yourself wanting to treat her gently.
● Watch the full-length PV (Menhera-chan version) for a deep dive into her voice:
https://youtu.be/1LOQyKJfDlk
Thumbnail image No.004 / A blood-staked “Chinchiro” battle. Deck-building roguelite Chinchiro game “Menherarium,” demo release on October 11
Yūko Natsuyoshi
Born May 1.
From Osaka Prefecture. Debut in 2018.
Will voice the lead role of Nanami Nana in the anime A Workplace Where Smiles Never Cease, airing from October 2025.
Other notable works include Shuvalgran in Uma Musume Pretty Derby and Mayoi Koma in Utage wa Mirufiyuu. Also active as vocalist for music unit “Arika.”
A blood-staked roguelite Chinchiro game with an extremely emotionally unstable girl: Menherarium
———“Play with me until we die, okay ♡”
You are kidnapped by an extremely emotionally unstable girl and forced to play blood-staked Chinchiro every day. Overcome her absurd rules using dice modifications or cheating items, and survive for seven days.
Steam store page:
https://store.steampowered.com/app/3394770/_/
■ Keep winning Chinchiro matches against Menhera-chan.
Menherarium is a deck-building roguelite game where you must keep winning blood-staked Chinchiro battles against an extremely emotionally unstable girl. The core rules are based on one of the classic dice games: “Chinchiro.” You satisfy her by meeting the daily score target each day. Losing, however, results in a small amount of blood being drained.
Enjoy this sweet yet perilous Chinchiro battle with your adorable (yet terrifying) Menhera-chan!
It seems Menhera-chan is happy to play Chinchiro with you.
Menhera-chan can drain your blood at any time.
■ Survive using dice modifications and items!
Menhera-chan supports you as you struggle. You can use items to restore blood, and even rewrite dice rolls—though only if you have the right item. Use them wisely and strategically to survive.
Even with weak hands or mismatched rolls…
Using consumable items lets you manipulate dice outcomes.
…You can instantly transform into a stronger hand!
The higher your score, the more satisfied Menhera-chan becomes. Aim for “OVERKILL!”
■ Survive one day and receive a reward from Menhera-chan… Use it to strengthen your deck!
Upon surviving each day, you’ll be rewarded by Menhera-chan. After each Chinchiro round, she evaluates your performance, granting coins redeemable at the shop based on her assessment. Spend these coins on randomly appearing items, dice rolls, or packs to build and improve your deck.
After each day, the “Menhera Network” begins.
Menhera-chan evaluates your efforts.
A wide selection of helpful items and dice modifications are available.
Modify your dice to increase the chances of rolling desired hands.