Catalog 
Riichi City - Japanese Mahjong
LiveCard and board gamesBoard gameCasual and puzzle
- Platforms
- Release:
- 2022
- Developer:
- Formirai Co., Ltd.
- Scale:
- Average concurrent players389
- Player rating:
- 47.6% · 4.8K
- Profile data as of:
- September 2, 2026
Riichi City is a competitive urban-style Anime mahjong game, featuring beginner-friendly mahjong tutorials, Ranked Matches and tournaments crowded with masters! Spice up the experience with our ACG characters voiced by famous CVs, and attractive items and decorations! Set off for Riichi City now!
Screenshots
Images from the source page, in source order. Select an image to view it full size.
Videos
Videos from the game’s source page, in source order. Select one to open the original.
Overview
- Franchise
- Unknown
- Release date
- Windows — September 8, 2022
- macOS — September 8, 2022
- Linux — September 8, 2022
- iOS — 2022
- Android — 2022
- Developer
- Publisher
- Age rating
- ESRB M — Mature 17+ · IGDB mirror
- ClassInd L — Livre, age 0+ · Steam Store
- Content warnings
- Nudity or sexual contentMature content
- Interaction modes
- MultiplayerOnline PvPCross-platform play
- Session capacity
- 2 online, 1 offline · IGDB mirror
- Access model
- Free to play
- Monetization
- In-app purchases
- Storefront price
- Unknown
- Store contents
- Unknown
- Languages
- EnglishJapaneseChinese, Simplified scriptChinese, Traditional script
Classification
- Genres
- Card and board gamesBoard gameCasual and puzzleEvidence:
- Setting and subject matter
- Unknown
- Camera
- First-person Evidence:
- Visual style
- Anime
- Combat system type
- Card battle
Scale
Concurrent players · period average
389
August 18, 2026 — September 17, 2026
under 100over 1 million
- Detailed value
- 388.64
- Coverage
- Steam
- Origin
- Published by source
- Confidence
- Medium — The site's calculation method is not published
- Basis
- Average concurrent Steam players over 30 days from Steam Charts: 388
- Date observed
- September 17, 2026
- Source
- Steam Charts
Concurrent players · period peak
754
August 18, 2026 — September 17, 2026
under 100over 1 million
- Coverage
- Steam
- Origin
- Published by source
- Confidence
- Medium — The site's calculation method is not published
- Basis
- Peak concurrent Steam players over 30 days from Steam Charts: 754
- Date observed
- September 17, 2026
- Source
- Steam Charts
- Ratings
- players47.6% · 4.8KSteam, US storefront · Steam reviews
- players85.5%Global · IGDB mirror
- Last update
- September 2, 2026 — 【New Decorations Preview】 (20 updates over 90 days) · Steam update feed
Concurrent players
period average · September 2022 — August 2026 · Steam · published by source · Steam Charts
6340
September 2022August 2026
- Change over period
- ×3.1increase from 133 (September 2022) to 420 (August 2026)
- Gaps
- No gaps in observed months
- Observations
- 48
Mechanics
Key game systems from the Mechanics Catalog. Assessment axes are independent and are not combined into a single score. An unassessed mechanic is unknown, not absent.
Clan system
Not assessedA persistent player organization created or recognized by the game itself, with a stable membership, a life beyond one session, a shared identity, functions, and goals.
Player economy
Not assessedAn in-game system where player decisions materially influence at least part of the production, supply, distribution, or price of in-game value.
Territory control
Not assessedA system where players or organizations capture, hold, and use parts of the game world with lasting consequences.
Competitive PvP
Not assessedStructured competition between players with rules and a measurable outcome, usually including skill-based matchmaking.
Live service and updates
Not assessedA regular rhythm of meaningful updates, including seasons, patches, events, and a roadmap that supports a long product life.
Character progression
Not assessedA system for long-term character or account development through levels, skills, equipment, and specializations.
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Includes this game’s genres (Card and board games, Board game, Casual and puzzle) and their subgenres, sorted by concurrent players from highest to lowest.
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