怪異番号~20✕✕(ニーマルバツバツ)~

A text-based horror adventure centered on a mysterious phone number

EBA GAME · Released Mar 31, 2026

Reviews: Very Positive; 96% of 97
Recent reviews: Not enough recent
Players: 1; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 5 months ago; May 20, 2026
Minimum PC: 1280×720; 0.6 GB RAM · 0.8 GB disk; Full requirements

What is 怪異番号~20✕✕(ニーマルバツバツ)~?

Set in a Japanese city in 2005, this single-player text adventure follows a middle school student searching at night for a number said to predict romantic compatibility. You click through narrative text and dialogue, choosing one of four options on a map before following a linear story to its ending.

For you if...

+you want a short story lasting around two hours

Not for you if...

−you avoid stories referencing violence, suicide, or sexual themes

Screenshots and trailer

怪異番号~20✕✕(ニーマルバツバツ)~ system requirements

Minimum: 1280×720, 0.6 GB RAM, 0.8 GB of disk space.

As published by the developer.

Can my PC run 怪異番号~20✕✕(ニーマルバツバツ)~?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS: Windows 10/11
Processor: Intel Core 2 DUO 相当以上
Graphics: 1280×720
Memory: 600 MB RAM
Storage: 800 MB available space
Notes: だいたいどれでも動くと思います。

Does 怪異番号~20✕✕(ニーマルバツバツ)~ have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does 怪異番号~20✕✕(ニーマルバツバツ)~ run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Steam features: Family Sharing
Languages: Text only: Japanese.

Does 怪異番号~20✕✕(ニーマルバツバツ)~ use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam