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Play Underworld Empire for Free
KA Gaming
4
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Underworld Empire Slot Review
Channel your inner Tony Soprano in the Underworld Empire online slot. This crime-themed slot takes place on a dingy city street, with symbols including stacks of cash and guns. The game offers 25 paylines, free spins and special double symbols that can boost your winnings. Read our review below to learn more.
Game Info
Return to Player
98
Volatility
Low Medium
Provider
KA Gaming
Autoplay
Bonus Buy
Bonus Rounds
Cascading Reels/Avalanche Feature
Cluster Pays
Expanding
Free Spins
Gamble
Jackpot Slots
Megaways
Mobile
Multiplier Symbols
Mystery
Scatter Symbols
Spreading
Stacked
Sticky
Number of Paylines
25
Layout
Min Bet
0.25
Max Bet
125
Release Date
1/6/2025
Last Update
2/28/2025
About KA Gaming Game Provider
Other Games from KA Gaming
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Crime Doesn’t Pay… Usually
The Underworld Empire slot machine is a new slot from iGaming developer KA Gaming, a company founded in 2014 and currently based in Taiwan.
If you’re a fan of classic gangster films, you will love the Underworld Empire online slot. This slot features a cast of dangerous characters, as well as symbols that include revolvers, poker chips and glasses of champagne. These symbols spin across a 5x3 game board and animate as they form winning combos.
Double Symbols, Double Winnings
Your betting options when you play the Underworld Empire slot online range from 0.25 to 125.
Anywhere between three and 10 symbols on a line will score a win. Symbols can land as double symbols, which count twice in a payline. This makes it easier to land winning combos.
Wilds can replace any symbol except for double and scatter symbols.
The slot’s free spins mode is triggered by landing three or more scatters. Before free spins starts, you’ll be asked to spin a wheel. The results of this spin will determine how many free spins you get, either 10, 15, 20, 30 or 40. The wheel also contains double symbols, and whichever you land on will remain in its double form for the duration of the feature.
Details about the volatility and RTP of the Underworld Empire slot machine have not been published.
Symbol
Three on a Payline
Seven on a Payline
10 on a Payline
Gun
0.8x
6x
12x
Cash
0.72x
4.8x
10.4x
Champagne
0.64x
4x
8.8x
Chips
0.56x
3.2x
8x
A
0.48x
3.2x
4.8x
K
0.32x
2.4x
4x
Q
0.32x
2.4x
4x
J
0.2x
2x
3.2x
10
0.2x
2x
3.2x
Looking for more crime-themed slots? We recommend checking out the Mafia Madness slot machine and the Gangster Alley slot machine.
Conclusion
Play Underworld Empire for free here at VegasSlotsOnline! This is a riveting crime-themed slot game with a host of exciting slot features to keep you entertained. The double symbol mechanic is a nice touch, and there are plenty of free spins up for grabs in the bonus round.