Jack Hammer 4 Chasing the Dragon: Slot Overview

Back in the digital stone age of 2011, software provider NetEnt unleashed Jack Hammer on slot fans, a pop-art, cartoon-styled game that introduced the inventive Sticky Wins feature. A couple of years later the studio returned with Jack Hammer 2, then left the detective on the shelf for over a decade before surprising players with Jack Hammer 3. Now, just a year on, the series shifts again—this time into a cluster pays format and, for the first time in the franchise, adds a hold ‘n’ bonus round in the online slot Jack Hammer 4 Chasing the Dragon.

Crime is everywhere, but here the action is set in Chinatown, described as the place ‘where crime slithers like a dragon.’ As a result, Jack Hammer 4 leans heavily into an Asian vibe: lanterns strung across the street, calligraphic touches on the grid, and a skyline that could be reminiscent of San Francisco’s Chinatown with the Bay Bridge sitting in the background—or maybe not, since NetEnt calls it a ‘noir-inspired Asian metropolis.’ Wherever it’s meant to be, the game keeps the series’ trademark comic-book look, with Jack appearing like he’s walked straight out of a Dick Tracy strip.

Gameplay takes place on a 6×6 grid, with stakes ranging from 20c to $/€40 per spin. The game launches with three RTP setups, where the most desirable return is 96.01%, and the underlying math model has volatility is high.

Wins are created by connecting 6 or more identical symbols vertically and/or horizontally. Paying icons include 3 Chinese characters (fortune, dragon, and peace), a pot, a dragon statue, plus four character symbols—the femme fatale blonde Pearl, a mysterious dark-haired woman, an older villain called Dragon, and Detective Jack Hammer as the top symbol. For a 6 OAK hit, payouts run from 0.3x to 1x, while filling the grid with a 36 OAK win returns 7.5x to 40x the bet.

Jack Hammer 4 Chasing the Dragon: Slot Features

Alongside Sticky Wins, the game adds several wild-related mechanics, a free spins hold ‘n’ win round, and Elevate feature buys.

Sticky Wins

A defining element of the franchise, the Sticky Wins feature is activated whenever there is at least one cluster win on the reels. Winning symbols are held in place as the remaining positions respin. If the win increases, the newly contributing symbols also stick, and another respin follows. The process continues until the win no longer improves, after which the final respin result is paid. Sticky Wins behaves the same way when at least 3 scatters appear on the reels.

Wild Features

Each corner position on the grid may only contain a Question symbol or wilds. Wilds replace any standard paying symbol. When a corner symbol is included in a win, it activates:

• Multiplier Wild – comes with a random multiplier from x2 to x10.
• Upgrader Wild – upgrades the symbols in the winning cluster into a higher-paying symbol type.
• Cash Prize Wild – randomly grants a reward of 0.5x to 2.5x the bet.
• Expander Wild – adds up to 4 symbols to the winning cluster that triggered the feature.
• Question Symbol – changes into a Multiplier Wild worth x30 or x50, an Upgrader Wild, a Super Upgrader Wild which transforms the winning cluster to the highest paying symbol, a Super Cash Wild awarding 10 or 25 times the bet, or a Super Expander Wild which adds up to 16 symbols to the winning cluster.

Free Spins

Hitting 5 scatters anywhere on the reels awards 3 free spins. The free spins round is a hold ‘n’ win style feature that starts with 3 multiplier symbols on the play area. Throughout the feature, 1x to 100x multiplier symbols can land. Whenever one appears, it sticks in place and resets the spin counter. During the bonus, four different features randomly appear in the four corner positions and stay there until free spins finish. These corner features trigger when at least one multiplier symbol lands next to the relevant corner.

• Unlock – may trigger no more than twice. The first trigger adds a top row, and the second trigger adds a bottom row.
• Generate – drops 3 multiplier symbols onto random empty spots. If fewer than 3 spaces remain, it fills all available positions. This can activate up to three times.
• Double – doubles the values of all multipliers that trigger this feature, plus any multipliers adjacent to them. It can activate up to three times until the Collect feature triggers.
• Collect – totals the values of all multipliers on the reels and removes them. The combined value is displayed by the Collect symbol.

Elevate Feature Buy

In the Elevate menu, players can trigger the Free Spins Hunt for 2x, which increases the likelihood of activating free spins. The Wild Activator option costs 10x, ensures at least one feature triggers, and also boosts the chance of free spins. Alternatively, players may buy free spins for 100x where 5 scatters land on a main game spin, super free spins for 300x, or a lucky draw for 150x. In super free spins, a single main game spin is played that triggers at least 3 wild features and lands 5 scatters.

Jack Hammer 4 Chasing the Dragon: Slot Verdict

There wasn’t a huge leap between the original Jack Hammer and its sequel, but Jack Hammer 3 tried to modernise things by using a scatter pays win mechanic, and the jump between the two most recent entries is also fairly significant. Scatter pays is gone, replaced by cluster pays—arguably a less ‘hot’ approach these days. Still, regardless of how wins are counted, the one constant holding the franchise together over the years has been Sticky Wins. Jack Hammer 4 uses it effectively: clusters land, build through respins until the win stops improving, and then the final result is paid. The idea of placing special symbols in each corner and triggering them when they connect with winning symbols is a clever touch, and their effects can be seriously impactful.

Opinions on the free spins hold ‘n’ win feature were split. It’s decent, though a little straightforward. Yes, multiple corner features can trigger and nothing is inherently wrong with it, but it doesn’t deliver a big wow moment. Multipliers drop and stick, the grid may expand, values can be doubled or collected—perfectly fine. The bigger surprise, especially after Jack Hammer 3‘s underwhelming top payout, is seeing a 10,000x max win tied to Jack Hammer 4. It turns out crime-fighting in Chinatown can pay well, and that stronger potential gives this instalment the heft its predecessor was missing.

Once the chase wraps up, Jack Hammer 4 leaves a generally favourable impression and feels like a more substantial release than the last game. Sticky Wins gets to shine within a different win format, NetEnt has—depending on your taste—added an alternative bonus round, and the win potential is much higher. Overall, Jack Hammer fans should be more than happy to take on the criminal underworld in this instalment.