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We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Design and theme
96 %
Features and playability
96 %
RTP and volatility
96 %
Slot machine details and review Sticky Lips
Sticky Lips is one of Endorphinaβs slot machines, and it has a classic influence in its design. Weβre talking about a Joker-themed game, which has a Lady Joker in the main role, along with all sorts of classic symbols on its reels, mainly from the fruit genre. The game area offers the player 5×4 reels, along with 50 active paylines.
Every slot machine must be developed by a company that invented, designed and put it into operation. Many players eventually find that they only enjoy playing on machines from specific software provider, so they narrow down their selection by preferred brand.
A high volatility slot. Wins are rare, but can be really big. The game has more pronounced fluctuations and can often go without hitting anything for a long time, suitable for players who like adrenaline, higher risk and work with a larger budget. More about volatility here.
Slot theme and symbols
The Lady Joker that shows up in the logo area is about the best-designed part of the game. There is no Joker on the reels, just her red lips that will serve as the wild symbol and can be sticky at times (hence the Sticky Lips title). The majority of its symbols will feature images of classic symbols, such as fruits, BAR, bells, and several Sevens. There are a total of 11 regular symbols that can land on the slot’s 5 reels.
Sticky Lips theme and symbols
As for the type of experience you can expect in Sticky Lips, itβs one that involves mostly the formation of winning combinations of 3-5 symbols, and sometimes there are some extra features that will trigger for you, but still basic ones (wilds and free spins). With a fairly large game area but also with plenty of symbols that show up, the slot ends up having high volatility, while paying at most 2,200x the stake. Itβs not a very generous top prize, but the long-term returns are good, with the RTP at 96.05%, similar to what other Endorphina online slots can deliver.
Yellow Seven
Red Seven
Bell
Watermelon
Strawberry
Grape
BAR
Plum
Orange
Lemon
Cherries
Special Symbols and Slot Features
3D
NO
Autoplay
YES
Free Spins
YES
Gamble Feature
YES
Locking Symbols
YES
Wild Symbol
YES
Win Multiplier
NO
Other features
Bonus buy
WILD symbol
Wild symbols appear on four of the five reels (the last four reels), so they may only be used as substitutes for all other symbols. There are no rewards paid by these Lips wilds directly.
Free Spins
Randomly, the wild symbols that show up can trigger a Lucky Time feature, which ends up triggering 10 free spins. For the duration of the free spins, the wild symbols that you get will become sticky. They will remain in the positions they land in for as long as you have free spins, and they can keep helping you form new winning combinations. You can even retrigger the free spins feature, also randomly via new wild symbols that get collected.
Risk Game (Gamble)
Endorphinaβs preferred gambling feature is a game of cards, where youβre looking to get a higher value card than the one that the dealer gets. Do this, and you double the winnings for that round. You can even keep playing it, for as long as youβre successful, doubling it each time. Lose a round, and the money won that round is forfeit. Itβs an optional feature.
Bonus Pop Buy
If you click on the Bonus Pop button, you will be offered the option to buy access to 10 free spins with sticky wilds, in exchange for a price of 73x the round stake.
Prize table
Symbol
Multiplier
2x in payline
3x in payline
4x in payline
5x in payline
Yellow Seven
0.10x
0.50x
1.50x
3x
Red Seven
0.10x
0.40x
1x
2x
Bell
0.30x
0.50x
2x
Watermelon
0.20x
0.40x
1.50x
Strawberry
0.20x
0.40x
1.50x
Grape
0.20x
0.40x
1.50x
BAR
0.20x
0.40x
1.50x
Plum
0.10x
0.20x
1x
Orange
0.10x
0.20x
1x
Lemon
0.10x
0.20x
1x
Cherries
0.10x
0.20x
1x
Our rating of the game
Sticky Lips
Sticky Lips is a slot machine thatβs designed for fans of simpler games, using the Lady Joker in the lead role, but without actually adding her to the reels. The free spins with sticky wilds are the ultimate feature offered inside, but mostly, you will be trying to form regular combinations. Itβs highly volatile, with an RTP of 96.05% and prizes that only go up to 2,200x the stake. Itβs not quite as generous as most players would expect it to be, but long-term, it pays back enough that I consider it fair.
75%
Editor's rating
Design and theme
70 %
70 %
Features and playability
80 %
80 %
RTP and volatility
96 %
96 %
How do we rate slot machines?
We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Wild symbols are available during the gameβs regular spins, helping you out when forming combinations.
The free spins feature uses sticky wilds, so getting paid is even easier inside.
A classic look for this slot machine, which is a plus for some players who prefer it.
A 96.05% RTP is calculated for this game, and thatβs a fair amount for it to be paying back long-term.
Has a Bonus Pop option, which allows players to buy access to the free spins feature.
Cons
Expect high volatility in this game, so losing gaming sessions are the typical outcome.
Pays up to 2,200x the roundβs stake, which is lower than expected in a high volatility slot.
The regular combinations pay very little, with the top symbol offering 3x for 5 positions occupied.
The dated graphics of this game are not enjoyed by everyone.
Manufacturer Endorphina
Endorphina is a Prague-based online casino software developer founded in 2012, known for creating visually stunning and mathematically balanced slot games. π° The company combines classic slot mechanics with innovative features and engaging storylines, appealing to both traditional and modern players. Endorphinaβs portfolio includes popular titles like Book of Vlad, Hell Hot 100, and Chance Machine 40, all designed in HTML5 for seamless play across devices. Licensed and regulated by reputable authorities, Endorphina continues to stand out in the iGaming world for its creativity, reliability, and focus on player experience.
18+. New Players Only. Β£10 minimum deposit. 100% up to a maximum of Β£200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to Β£200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. GambleAware.org
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
18+. New players only. Min dep. Β£20. Valid for 14 days from registration. Welcome Offer: Earn points for cash bets made to unlock wager-free spins on selected games: 2 points for every Β£10 bet on Slots, 1 point for every Β£10 bet on Video Poker and qualifying Side Bets. 0.25 points for every Β£10 bet on Roulette games. Maximum accumulation of redeemable points is limited to 2000. You will receive spins based on the number of points earned:10, 20, 35, 50 points = 5 spins, 70 points = 1 Superspin, 100 points = 10 spins, 200 points = 5 Superspins, 300 points = 4 Superspins, 500 points = 6 Superspins. Additionally you will earn an extra 120 Spins for every 375 points earned above the 500-point threshold, until you reach a total of 2000 points. Spins credited the next day. Spin winnings credited as cash funds and capped at Β£100 per batch of spins. Cash funds are immediately withdrawable. Wager-free spins must be used within 72 hours. Terms Apply. BeGambleAware.org.
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
Total bonus amount
90 %
Easy to reach
89 %
Bonus conditions
90 %
Casino rating
91 %
Warning: Play and gamble responsibly | Gambling may be addictive 18+ | Underage gambling is an offence | When the fun stops, stop.
I am a writer who specializes in slot machines. I've been writing about them since 2013 and have reviewed thousands of slot machines over the years. I continue to cover the industry and review new releases for Bonusmenu. When I'm off the clock, you'll find me buried in a book or wandering the virtual wastelands of Fallout and the provinces of The Elder Scrolls.
18+. New Players Only. Β£10 minimum deposit. 100% up to a maximum of Β£200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to Β£200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. GambleAware.org
18+. New players only. Min dep. Β£20. Valid for 14 days from registration. Welcome Offer: Earn points for cash bets made to unlock wager-free spins on selected games: 2 points for every Β£10 bet on Slots, 1 point for every Β£10 bet on Video Poker and qualifying Side Bets. 0.25 points for every Β£10 bet on Roulette games. Maximum accumulation of redeemable points is limited to 2000. You will receive spins based on the number of points earned:10, 20, 35, 50 points = 5 spins, 70 points = 1 Superspin, 100 points = 10 spins, 200 points = 5 Superspins, 300 points = 4 Superspins, 500 points = 6 Superspins. Additionally you will earn an extra 120 Spins for every 375 points earned above the 500-point threshold, until you reach a total of 2000 points. Spins credited the next day. Spin winnings credited as cash funds and capped at Β£100 per batch of spins. Cash funds are immediately withdrawable. Wager-free spins must be used within 72 hours. Terms Apply. BeGambleAware.org.
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Software provider
Game typeSlot
Reels
Winning paylines50 paylines
