G Mode Launches Demo Versions of Puzzle Action Games "Nero to Saito" and "Ropu-kun Adventure"; Participating in Steam Next Fest Starting October 13

G-mode today (October 10, 2025) announced its participation in the upcoming “Steam Next Fest”, set to run from October 13, and has released playable demos for two PC games: “Néro & Sci” and “Rope-kun Adventure.”

Thumbnail image No.009 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13

“Néro & Sci” is a puzzle-action game developed by French indie studio Souris-Lab. Set in a beautiful world adorned with numbers, mathematical symbols, and geometric shapes, the game was supervised by the Lyon Mathematics Institute (IREM de Lyon).

“Rope-kun Adventure” is a puzzle-action title created by independent developer Kei26. Players will explore the infinite potential of ropes—pulling, bouncing, tying—to overcome various puzzles and gimmicks.

G-mode announces the first public release of playable demos for two new titles at “Steam Next Fest,” starting October 13!
The publishing rights have been secured for both “Néro & Sci” and “Rope-kun Adventure”!

G-mode Corporation (Headquarters: Shinagawa, Tokyo; President & CEO: Seiichiro Kato https://gmodecorp.com/) is pleased to announce that it will publish the puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” both of which have been confirmed for participation in the upcoming “Steam Next Fest.” Playable demos for these two titles are now available.

Thumbnail image No.001 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13

Playable demos for both new titles will be available starting October 13 (PT)! Experience these games early.
We kindly ask you to try them out and add them to your wishlist.

[Event Dates]
October 13, 10:00 AM – October 20, 10:00 AM (PT)
(October 14, 2:00 AM – October 21, 2:00 AM JST)
Note: Demo access will continue beyond the event dates, but may be terminated without prior notice.

▼ Steam Next Fest Event Page
https://store.steampowered.com/sale/nextfest

New Title (1) “Néro & Sci”

Thumbnail image No.003 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13

Thumbnail image No.004 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13 Thumbnail image No.005 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13

“Néro & Sci,” developed by French indie studio Souris-Lab, will be published in Japan and Asia for Nintendo Switch by G-mode.

“Néro & Sci” is a puzzle-action game set in a stunning world filled with numbers, mathematical symbols, and geometric forms. The game was developed and tested under the supervision of the Lyon Mathematics Institute (IREM de Lyon).

The demo includes the tutorial plus the first three levels of World 1.

▼ “Néro & Sci” Steam Page
https://store.steampowered.com/app/2928570/
▼ “Néro & Sci” Intro Video
https://youtu.be/6IJ7celcTu8

About Developer “SOURIS-LAB”

Established in France in 2019, this independent game development studio blends artistry, thoughtfulness, and experimental learning to create interactive experiences accessible to a broad audience—even those who don’t typically play games.
“Néro & Sci” explores the fusion of science, poetry, and gameplay, portraying a world where logic becomes the language of creativity. The game’s unique mechanics have drawn attention for their educational potential, leading to an ongoing spin-off project: “Néro & Sci : Éducation.” Designed specifically for school use, this title was developed with support from the following French institutions and organizations:

• Lyon Mathematics Education Institute (IREM de Lyon)
• Texas Instruments France
• French Ministry of National Education

【Developer Website】https://souris-lab.com/ja
【Developer X】https://x.com/SourisLab

New Title (2) “Rope-kun Adventure”

Thumbnail image No.002 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13

Thumbnail image No.006 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13 Thumbnail image No.007 / G-mode releases demo versions of puzzle-action games “Néro & Sci” and “Rope-kun Adventure,” joining the “Steam Next Fest” launching October 13

G-mode is serving as publisher for “Rope-kun Adventure,” a puzzle-action game developed by indie creator Kei26, on both Nintendo Switch and Steam.

“Rope-kun Adventure” is an overhead-style puzzle-action game. Unleash the full potential of ropes and help Rope-kun overcome various challenges!

The demo features eight stages: from 1-1 to 1-8.

▼ “Rope-kun Adventure” Steam Page
https://store.steampowered.com/app/2919070/
▼ “Rope-kun Adventure” Intro Video
https://youtu.be/383ngeJJMO4

About Developer “Kei26”

An independent game developer who aims to create games that are enjoyable even for those not skilled at or unfamiliar with gaming.
A first-generation participant in the Ministry of Economy, Trade and Industry’s creator support program “Sōfū.”
At BitSummit the 13th, “Rope-kun Adventure” won the “KIDS SELECTION AWARD.”

【Developer Website】https://www.kei26.com/home
【Developer X】https://x.com/kei26game