Jack Hammer 4 Chasing the Dragon: Slot Overview
Jack Hammer 4 Chasing The Dragon is the fourth entry in NetEnt's long-running detective franchise, and it marks a significant shift for the series. Played on a 6x6 grid using Cluster Pays, it moves away from the scatter pays system introduced in Jack Hammer 3 and introduces a hold-and-win free spins round alongside the signature Sticky Wins mechanic. The setting is a noir-inspired Chinatown, complete with glowing lanterns, calligraphic symbols, and a backdrop that could easily pass for a stylised San Francisco. Wagers range from 0.20 to 40 per spin, with a default RTP of 96.01% and high volatility.
Compared to the studio's previous work on this series, the design choice to adopt cluster pays and a hold-and-win bonus is a clear attempt to modernise the franchise. I found the comic book art style as sharp as ever, though the gap between this entry and its predecessor is wider in terms of mechanics than any previous sequel in the series.
Symbols and Paytable
Lower-paying symbols are three Chinese characters representing fortune, dragon, and peace. Higher up the paytable sit a pot, a dragon statue, and four character symbols: Pearl (a femme fatale blonde), a mysterious raven-haired woman, the villainous elder named Dragon, and Detective Jack Hammer at the top. A 6-symbol cluster pays between 0.3x and 1x the bet depending on the symbol, while filling the entire 36-cell grid with one symbol awards 7.5x to 40x.
What stands out here is how much the four corner Wild types change the maths. Multiplier Wilds carry x2 to x10 values, Upgrader Wilds convert cluster symbols to a higher-paying type, Cash Prize Wilds add 0.5x to 2.5x on top, and Expander Wilds bolt up to 4 extra symbols onto a cluster. Corner positions can also hold Question Symbols that transform into super variants with dramatically stronger effects, including x30 or x50 multipliers and Super Expanders that add up to 16 symbols.
Symbol Payouts
| 36 | x40 |
| 6 | x1 |
| 36 | x7.5 |
| 6 | x0.3 |
Bonus Features and Free Spins
Sticky Wins remain the backbone of the game. Any cluster of 6 or more matching symbols triggers the feature: winning symbols lock in place, remaining positions respin, and new matching symbols that join the cluster are also held. Respins continue until no improvement is made. The mechanic also applies when 3 or more scatters land, holding scatters in place while respinning for more.
Landing 5 scatters activates the Free Spins round, which uses a hold-and-win format. You start with 3 spins and 3 multiplier symbols already on the grid. Only multiplier values between 1x and 100x can land during the round, and each new one resets the counter to 3. Four corner features stay active throughout: Unlock adds a top or bottom row (up to twice), Generate places 3 multiplier symbols on empty spots, Double doubles adjacent multiplier values, and Collect sums all multipliers and clears the board.
Reactions to the free spins round were mixed across reviewers, and I share that view. The corner features are functional and can interact well, but the round lacks a standout wow moment. Where the slot redeems itself is the 10,000x max win, a massive improvement over Jack Hammer 3's disappointing ceiling.
Bonus Buy Options
Elevate Feature Buy Options
NetEnt provides a tiered Elevate Feature Buy menu. Free Spins Hunt costs 2x the bet and doubles the chance of a natural trigger. Wild Activator at 10x guarantees at least one wild feature fires on the spin. Buying Free Spins outright costs 100x, Super Free Spins run 300x (at least 3 wild features activate plus 5 scatters land), and a Lucky Draw at 150x provides a randomised entry. The range of options here gives players flexibility, though the 300x Super buy is steep for a 10,000x cap.
RTP, Volatility, and Max Win
Default RTP sits at 96.01%, with alternative configurations at 94.01% and 88.06% available to operators. Volatility is rated high. The maximum win is 10,000x the bet, with a probability of roughly 1 in 50 million spins according to published data. Compared to the series' earlier entries, this is a substantial leap in potential; Jack Hammer 3 was widely criticised for its low top prize, and NetEnt has clearly responded.
