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Joker Stacks by iSoftBet (Slots)

Characteristics of the game

Reels 5
Lines 15
Progressive Jackpot No
Bet per Line From 0.01 to 1
Max Bet 15
Max Payout x150
Scatter Symbol Yes
Wild Symbol Yes
Bonus Game Есть
Double (Gamble) Game No
Free Spins Yes
Auto Play Yes
3D slot Yes
Theoretical RTP 96.6%
Can play for free without registration Yes

Here comes an unusual slot machine produced by iSoftBet company. It is going to surprise you by original design, advance features of Wilds and special bonus options. Functional features of this model and general rules of the game are carefully described in the following review by

General description

«Joker Stacks» is an online video slot with five reels and fifteen pay lines, which are always active on default.
The reels are of different height. First, third and fifth fit by three symbols each. Meanwhile, second and fourth show by four icons.
Bets per each line must be same: from one cent to one euro per line (from fifteen cents to fifteen euro per spin).
The game is provided with seven ordinary symbols, a stacked Wild, a Scatter, free spins with special prizes, as well as bonus rounds with Wilds.
The basic symbols bring payoffs, forming combinations of three, four or five same elements, situated next to each other at same active line. All combinations must begin from the first left reel.
Wins are calculated by special indexes from x7 to x150, provided by the rules for each of the possible combinations, and bet per line. Multiply paid combinations can be formed in result of a round, but only the most valuable at each line is taken in account.
«Joker Stacks» doesn't have a gambling feature. Prize options are discussed below in the article.


Cherries, lemons, watermelons, bells, as well as blue and red sevens form combinations by the general rules, described above. Same symbol may form vertical stacks at the reels.
Special symbols work in different way:
  • Wild (jester in a hat) works as a joker. It replaces other symbols in combinations, except the Bonus. Wild also takes part in prize spins.
  • Bonus (a star) can be found only at the first, third and fifth reels. Three such symbols at any cells of the screen trigger free spins.
Amounts of potential wins and other information about symbols can be found on the pay table.

Bonus games

This paragraph is about bonus options of «Joker Stacks».
  • Stacked Wild – Wilds may fill whole first, third or/and fifth reels during any basic spin.
  • Free Spins – fifteen spins on the casino’s expense by the bet of previous regular round. Please read about prize options, available during free spins, below.
  • Sticky Stacked Wild Jokers – a counter with numerous cells appears at the bottom part of the screen. Each Wild marks a scale. As soon as you get control point, first reel is loaded by Wilds till the end of free spins. Second point turns third reel into Wild, while final position makes the same with fifth column. Each passed level brings extra free spins, added to remaining.
All bonus features, available on this slot machine, are demonstrated in our video review at


iSoftBet doesn't draw any progressive jackpots on «Joker Stacks» video slot.


You can see following elements at the control panel:
  • Total Bet (Coins) – open panel of bets;
  • Auto Spin – switch to automatic game with adjustable limits;
  • Pay Table – open the pay table and rules;
  • Winnings – amounts of wins in coins;
  • Bet – an amount of the bet in credits;
  • Balance – state of the balance;
  • Credit – available coins; 
  • Win – an amount of the win in cash.
It is possible to scroll the pay table manually or move with help of buttons at the top part of the screen.
«Joker Stacks» provides an opportunity to set limits of automatic game, select convenient size of the screen, set up sound parameters and other options. It is not necessary to download the slot.


In conclusion of the review, we would like to highlight strong and weak sides of «Joker Stacks».
  • Pros: an interesting gameplay with numerous payoffs and exciting bonuses, a convenient interface, a stunning design, a spectacular animation.
  • Cons: poor range of bets, poor settings.
Please be aware of average levels of volatility and RTP.

Where to play

You can test «Joker Stacks» slot machine free at or play for real money at online casinos powered by iSoftBet. Such websites are listed below the review.
You are welcome to share your opinion about the novelty. Please write responses about «Joker Stacks» and score the game in comments.
Rating: 9.00 / 10
( votes: 1 )
Date: 2018-01-23

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