Anomaly Mahjong

Japanese mahjong with rule-breaking opponents and rounds built around puzzles

YUTAMARO WORLD · Released Sep 26, 2024

Reviews: Mixed; 65% of 98
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Untested
Last update on Steam: 4 months ago; Jun 27, 2026
Minimum PC: GeForce GTX 1060; 8 GB RAM · 2 GB disk; Full requirements

What is Anomaly Mahjong?

This single-player, top-down mahjong game centers on escaping a repeating match. You report rule violations by clicking revealed or discarded tiles, while puzzle rounds require calls and discards that meet specific conditions. Missing a violation or failing a round's conditions sends you back to the opening round.

For you if...

+you like adapting your strategy to changing round objectives

Not for you if...

−you do not already know the rules of Japanese mahjong

What players say

65% of 98 reviews are positive

Players praise the humor in its unusual mahjong matches.

Screenshots and trailer

Anomaly Mahjong system requirements

Minimum: GeForce GTX 1060, 8 GB RAM, 2 GB of disk space.

As published by the developer.

Can my PC run Anomaly Mahjong?

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Minimum

OS: Windows 10
Processor: Intel Core i7-6700
Graphics: NVIDIA GeForce GTX 1060 3GB
Memory: 8 GB RAM
Storage: 2 GB available space
DirectX: Version 12

Does Anomaly Mahjong have co-op or multiplayer?

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

Single-player

Does Anomaly Mahjong run on Steam Deck?

Untested Not yet tested by Valve on Steam Deck.

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 13
Steam features: Family Sharing
Languages: Text only: Japanese, English, Simplified Chinese, Traditional Chinese, Korean.

Does Anomaly Mahjong 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