JDB Gaming Portfolio
JDB Gaming: The Studio Behind Mahjong and Its Other Slots
Mahjong is one title inside a much larger JDB Gaming catalogue built around fish-shooting games and Asian-themed slots.
- Risk level
- high
- Reels in play
- 5x3
- RTP
- 96.32%
- Best possible win
- 16800x
- Lines
- 25 paylines
Mahjong is developed by JDB Gaming, an Asian-origin studio better known for fish-shooting games than for slots. Mahjong is one of many Asian-themed video slots in a catalogue that industry listings put at more than 150 titles, alongside card, bingo, and arcade games.
- JDB is not primarily a slot studio; fish-shooting games are described as its signature category.
- Mahjong is not presented in JDB's own material as a flagship or marquee release.
- JDB also has a separate mahjong-themed title, Big Three Dragons, which is easy to confuse with this one.
Inside JDB Gaming's Catalogue
Industry profiles place JDB Gaming's origins in Asia, with some sources pointing to around 2010 and an earlier operating name, JDB168. Company listings are not fully consistent on headquarters, with one placing operations in Vietnam and another citing a Malta office tied to a group-level gaming supply licence. What the sources agree on is that JDB grew from a regional Asian supplier into a studio with international reach.
The studio's reputation rests heavily on fish-shooting games rather than slots. Multiple listings brand JDB as a leading, even premier, developer in that genre, which shapes how the rest of its catalogue is built and marketed to operators. Slots sit alongside fish-shooting, bingo, card, and arcade content rather than at the centre of the brand.
Within the slot side of the catalogue, reviewers point to titles such as Dragon of the Eastern Sea, Fortune Treasure, Spirit Tide Legend, Piggy Bank, and Super Niubi Deluxe. These games use varied mechanics, from megaways-style boards to hold-and-spin rounds and number-linking features, which suggests JDB experiments across formats rather than sticking to one template.
Mahjong fits into this catalogue as a straightforward 5x3, 25-line video slot themed around mahjong tiles, with a wild, a scatter-triggered free spins feature, and multipliers that can scale a round's win. It sits next to other culturally themed releases rather than standing out as JDB's headline product, and there is no indication in available material that the studio positions it as a top seller.
JDB distributes its content through casino platforms and aggregators via API integration, and its commercial footprint is described as strongest in Malaysia, Thailand, Indonesia, and Australia, with expansion into Latin America and other markets. Most access to its games, including Mahjong, comes through online casino lobbies and browser-based demo pages rather than land-based cabinets.
How Mahjong's Volatility Fits JDB's Style
Mahjong is described across review sites as a high-volatility slot, which means long stretches with little return between larger hits rather than frequent small wins. That pattern lines up with how several other JDB Asian-themed slots are described, where multiplier-driven bonus rounds are built to produce occasional large payouts rather than steady, low-swing sessions. Anyone used to lower-volatility studios should expect a rougher, streakier session on this title and budget a bankroll accordingly.
Mahjong Technical Specifications
| Provider | JDB Gaming |
|---|---|
| Reels | 5x3 |
| Paylines | 25 paylines |
| Volatility | high |
| RTP | 96.32% |
| Max win | 16800x |
| Bet range | 0.10 – 100 |
| Released | 26/09/2025 |
Mahjong's RTP Setting
96.32%
Independent trackers consistently report Mahjong's RTP in the 96.28-96.32% range, which points to more than one live configuration rather than a single fixed figure. JDB's own site does not publish an RTP for this title, so the range above reflects third-party tracking rather than a studio-confirmed number.
About JDB Gaming
JDB Gaming is a mid-sized Asian-origin supplier, reported to run a staff of roughly 51-200 people and a catalogue exceeding 150 titles across slots, fish-shooting games, bingo, card games, and arcade content. It is best known within the industry for fish-shooting games rather than slots, and its output leans toward Asian themes and classic casino mechanics layered with modern multiplier and feature-driven bonus rounds. Reports point to certification from testing labs such as GLI and BMM Testlabs and to licensing tied to PAGCOR and, at a group level, the Malta Gaming Authority. Live performance snapshots from slot analytics services have shown JDB titles trending well on big-win and reach metrics at monitored casinos, suggesting an active, if not top-tier, presence in the wider slot market.
Questions About JDB Gaming and Mahjong
Does JDB Gaming make another mahjong-themed slot besides this one?
Yes. JDB also publishes Big Three Dragons, a heavily mahjong-themed title that reviewers frequently mention alongside Mahjong, and the two are easy to mix up when browsing a casino lobby.
Is Mahjong typical of what JDB Gaming usually builds?
Not entirely. JDB's strongest reputation is in fish-shooting games, and its slot lineup leans on Asian mythology and feature-heavy formats like megaways boards or hold-and-spin rounds, so Mahjong's simpler 5x3, 25-line layout is on the more conventional end of that range.
What is JDB Gaming best known for outside of slots?
Industry write-ups describe JDB as one of the leading developers of fish-shooting games, a genre distinct from slots that combines arcade-style shooting mechanics with cash prizes, and this is treated as the studio's signature product line.
Are other JDB slots also high volatility like Mahjong?
Several of JDB's other Asian-themed slots, including titles built around multiplier and hold-and-spin mechanics, are also described as high volatility in reviews, which suggests this is a recurring design choice for the studio rather than something specific to Mahjong.
Try Mahjong at a Partner Casino
Play at partner casinoIf you want to see JDB Gaming's take on mahjong-themed slots for yourself, you can play Mahjong through one of our partner casinos. Play is intended for players 19+ (18+ in AB, MB, QC) and should stay within a budget you're comfortable with.