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Jack Hammer

Game information

Progressive Jackpot
Configurable winlines
Gamble feature
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Last update 12 Sep 2019
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Jack Hammer

Try Jack Hammer slot online for free in demo mode with no download and no registration required and read the game's review before playing for real money.

Very low
Mobile, Desktop
8.43 Guru Score
Quick verdict
The Jack Hammer slot has great graphics and animations, average sound effects and an interesting gameplay thanks to the Sticky Win feature. Its RTP is 97%, which is above average.
Read full review ↓

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Jack Hammer is a slot machine from NetEnt which was also followed by sequels Jack Hammer 2 and Jack Hammer 3 thanks to its popularity. It features a comic book style and captures a fight between a superhero called Jack Hammer and The Evil Wüten.

It’s a fast-paced slot machine with some unique and interesting game elements, as well as action-packed spins and a free spins feature. Jack Hammer’s slick animations, unique graphic style and nice sound effects and background music make the game very enjoyable to play.

Jack Hammer gameplay

After you first launch the game, Jack Hammer might seem just like any ordinary slot game with 5 reels, each with 3 reels. However, Jack Hammer works slightly differently. It’s true that symbols are organized in a 5x3 layout, but each of the symbols spins separately. It can be said that Jack Hammer has 15 individual reels. The number of active winlines is 25 and it can’t be changed.

What makes Jack Hammer even more interesting, is the Sticky win feature. When you first get a winning combination on at least one of the winlines, all reels that are not part of any winning combination spin again. If new symbols are added to the existing winning combinations, or if new ones are created, the non-winning reels spin again. This keeps happening until no new winning symbols are added or until all 15 reels (symbols) are used in at least one winning combination.

Jack Hammer free spins

Apart from the Sticky win feature, there is also a feature of free spins. You win 10 free spins for 5 Free Spin scatter symbols. The number of awarded free spins increases with the number of Free Spin symbols, up to a maximum of 30 free spins for 9 or more symbols. All wins are tripled during the free spins. Triple wins and the Sticky win feature can result in very nice winnings from the free spins.

The Sticky win feature can also help you trigger the free spin feature. You need at least 5 Free Spin symbols, but if you get at least 3 at first, the other reels will spin again to give you a better chance to trigger free spins.

Gameplay video featuring free spins

Jack Hammer RTP, volatility and bet sizes

The Jack Hammer slot game has a very interesting RTP of 97 %, which is higher than the average RTP of slot machines. The bets start at €/£/$0.25 and can go as high as €/£/$125 per spin. The maximum win from one spin is 250 000 coins, with a bet of 10 coins per line and a full screen of the highest paying symbol – Jack Hammer. In other words, the maximum win per spin is 1000-times the total bet.

I consider Jack Hammer a game with medium volatility. The Sticky win feature can bring you quite nice wins, but the premium symbols are quite rare, so it can be tough to hit a substantial win in one spin. The free spin feature with a 3x multiplier can help, but it’s not a guarantee of a big win, as you can easily go 10 free spins without a single winning combination.


Jack Hammer’s smooth gameplay and a 97 % RTP make it a very interesting slot game to play. The Sticky win feature makes spins more thrilling, especially when you get an initial winning combination and root for good symbols to fill up the empty reels and increase your winnings.

Want to try it out? Play Jack Hammer for free on our website and decide whether you want to try it out in a real casino.

Author: Maros | This review was last updated: 12 Sep 2019
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