Return to Player
96.16%
Minimum bet size
0.10
Slot format
Classic Slots
Volatility level
Low
Number of reels
5
Progressive jackpot
No
Popularity
Maximum bet size
6
Game Provider
Gamomat
Bonus features
Yes
Paylines
10
Theme
Classic
Stacks of Jacks Online Slot Game
Stacks of Jacks takes a classic-slot approach, with familiar fruit symbols and low-variance gameplay. Its combinations can pay sizable multiples of a spin bet. Players who want a straightforward video slot with a gamble option instead of elaborate features may enjoy the Stacks of Jacks format.
Theme and Storyline
Stacks of Jacks keeps its theme simple. This classic slot game features fruit symbols that have appeared in the online slots world for many years. The familiar joker or jester is also included, a character often seen across the gambling industry.
Graphics, sounds and animations
Stacks of Jacks has a pared-back visual style, without elaborate graphics or animations. The review suggests its lightweight presentation should work on almost any mobile device, regardless of hardware specs. Although technically a 3D slot, it uses basic 2D-style visuals. A 60s-inspired border frames the reels and adds to the traditional look, while multicolored boxes on either side mark the pay lines. Electronic effects recreate the familiar sounds of a classic slot, even for people who do not usually play online slots.
Top Casinos to Play Stacks of Jacks
How the gameplay works
Stacks of Jacks is a 5-reel slot with 3 symbol rows and 10 fixed paylines. Every symbol, including the wild, can land on its own or in stacks 2, 3, 4, or 5 symbols tall.
The main feature is a stacked wild that can appear on every reel. Shown as a joker, it acts as the wildcard in the Stacks of Jacks online slot and can replace any of the 10 regular symbols. Landing 5, 4, or 3 wilds on a payline awards 200x, 50x, or 5x the spin bet, respectively.
The regular symbols come from the classic slots tradition. In descending value, they are 7s, bells, bars, melons, grapes, plums, oranges, lemons, and cherries. The review lists 30 possible combinations and notes that only 5 pay less than the spin bet.
Matching 7s or bars award 50x, 10x or 2.5x times the spin wager for 5, 4 or 3 matching symbols. Bells and bars pay 25x, 7.5x or 2x times the wager. A payline with 5, 4 or 3 melons or grapes pays 20x, 5x or 1.5x times the wager. Plums, oranges, lemons and cherries pay 10x, 2.5x or 0.5x times the wager for 5, 4 or 3 matching symbols on a payline.
Controls include spinning with the spacebar, turbo spin, and automatic entry into free games. Find these options under the ‘cog’ button. You can also open the paytable with the ‘$’ symbol, set the reels to spin at max bet, and configure auto spins.
Bonuses and free spins
Gamble Feature: After each win, you can try to double the payout by guessing whether the next card will be red or black. A correct guess doubles the bet, after which you can collect or gamble again. Before choosing, you can risk just half the win with the double option, which the review says is the choice most slot players make. It also claims the bet has no house edge and offers fair 50/50 odds; these are stated claims, not an independent guarantee.
Bet sizes, RTP and volatility
Use the /- control on the slot panel to set your ‘bet per line’. The stated min-max is 0.01-0.60. Multiply the displayed amount by the 10 fixed paylines for a total spin bet of 0.10 to 6.00. Selecting ‘max bet’ sets the wager to 6.00 per spin. The review classifies this as a low-variance slot and says that wins should come frequently despite the lack of features. It also claims that 26 out of 30 combinations return more than the spin stake. The reported RTP is 96.16%; RTP is a long-run theoretical measure, not a promise about any individual session.
Conclusion
Gamomat puts a fresh spin on familiar slot mechanics in an entertaining 5-reel, 10-payline format. Stacks of Jacks may appeal to fans of classic video slots who enjoy straightforward gameplay. After a win, a gamble feature—reportedly not shown in the paytable—offers the chance to double winnings. The standard symbols and wild joker are stacked, so one symbol can cover the reels, form 5-symbol combinations across all 10 paylines, and potentially reach the 2,000x maximum payout. That is a stated game claim in the review, not a guarantee of profit.
Evan Carrington brings more than 12 years of experience in the iGaming industry, specializing in online casino reviews, slot game analysis, and player safety assessments. Their expertise includes casino licensing, RTP, volatility, bonus terms, and withdrawal policies. Combining hands-on reviews with independent research, Evan provides clear, evidence-based coverage to help players understand gambling platforms, their features, and possible risks.
