Bubble Up! review
Pragmatic Play · August 24, 2026
In the iGaming scene, when you head deep underwater, you often experience one of two things - either a world of malevolent flesh-tearing entities aka Razor Returns, or a Finding Nemo kind of world full of aquatic beings living lives of carefree ease. Software provider Pragmatic Play has taken the latter route and dialled up the cutesy, feel-good vibes when it developed its floating around underwater slot Bubble Up. Those interested in joining us as we hang with hermit crabs, make sure to be on the lookout for a frame feature which hauls in Money symbols like a deep-sea trawler, and a free spins round bolstered by a progression feature and various modifiers, all without a single bass fish in sight.
You'll need your virtual oxygen tank and mask for this one, players, because Bubble Up dives deep to the very bottom of the sea. Down there, a happy-go-lucky octopus sits cheerfully on an Easter Island-style stone head, plant life clings to rocks, and bubbles do their bubbling to the surface thing. It's a jolly place to be, made even more so by a relaxing, there's not a care in the world, Caribbean-inspired tune. With a bit of imagination, you can close your eyes and pretend you're lying in a patch of warm water, all of your responsibilities taken care of, putting all of your worries on hold for a moment. Okay, maybe a lot of imagination is needed to reach that level of zen, but audiovisually, Bubble Up is the type of undersea slot that leans to the relaxing side of the emotional scale.
A bubble-framed play area made up of 6 reels and 5 rows is where the gaming is held. There are 40 paylines, evaluating winning combinations that start from the leftmost reel onwards. The watery depths hide a medium volatile math model, which produces an RTP of 96.52%, though be aware of lower return models. To choose a stake, simply click the minus, plus, or coins icon, where the selection varies from $/€0.20 to $/€240.
From the lowest to the highest value pay symbols, there are four shell symbols, shrimps, seahorses, and four fish symbols. Payout values when landing 6 matching symbols vary from 2.5x to 25x the stake. Wild symbols do not appear in Bubble Up.
Bubbling up from the gameplay depths are a frame feature, free spins, special bets, and a feature buy.
In the base game, a frame of 2x2 to 6x6 in size may randomly appear on the grid. When this happens, the values of any Money symbols within a frame are added together and paid. Money symbols land with values of 0.5x up to the 10,000x Maxi prize. A second frame may also randomly appear on the same spin, and when two frames overlap, any Money symbols in the overlapping area are multiplied by x2 to x10. Money symbols also pay when they create a winning line, up to 5x for 6 OAK.
Hitting 3, 4, 5, or 6 scatters triggers 6 free spins with 1, 2, 3, or 4 modifiers, respectively. Before free spins begin, eight coins appear on the screen. Players click coins to reveal modifier names until two of the same names are revealed, up to the modifier limit of the current round (1-4). After revealing two of the same, that modifier applies to the free spins round. Modifiers include more Money symbols on the reels, more scatters on the reels, starting the round with the frame expanded to 3x3, and two frames on every free spin.
During the round, at least one frame will land on each free spin. When scatters hit, they are collected in a trail above the grid. For every 3 scatters collected, the frame expands one level from 2x2 to 3x3, 4x4, 5x5, up to 6x6. Two free spins are awarded each expansion. If more than 3 scatters are collected on a single free spin, all corresponding upgrades are awarded.
There is one feature buy, and that is free spins triggered by 3+ scatters for 100x the bet. The three special bets are an ante bet for 1.5x, where, when free spins trigger, 2, 3, 4, or 5 modifiers are revealed before the round starts for landing 3, 4, 5, or 6 scatters, respectively. Super Spin 1 costs 20x to guarantee one frame of a random size on every base game spin, or Super Spin 2 costs 100x to guarantee two frames on each spin. Free spins cannot trigger from either Super Spin.
When it comes to slots that take place around the waterline, Pragmatic Play and Reel Kingdom's Big Bass series has cornered a significant segment of the angling slot market. As for slots that dive deep beneath the waterline, the results have been mixed. The last couple, Mermaid's Treasure Trove and Wild Wild Pearls, were okay, a bit middling, which is about how Bubble Up came across, as well. A lot of the time, the game seemed more focused on relaxed presentation than adrenalised excitement. The tranquil atmosphere isn't without its charm, but it took time for anything interesting to occur, and the game might have worked better if it used scatter or cluster pays than paylines on its large playing area.
Trigger free spins and line wins practically fade away to nothingness in importance when compared to trying to net Money symbols in frames. Bubble Up helps out in this phase of play by tossing out a frame on every single free spin - two if you've got the double frame modifier. Even then, Bubble Up felt lacking on the excitement side. Positive moments are of course possible. Money symbols can theoretically land with sizable values, and those caught in overlapping frames also benefit from being multiplied. Bubble Up's win cap is quite enticing, at 10,000x the bet, achievable in one hit, should the Maxi be scooped in a frame. The progression element adds some much-needed suspense, as well, giving Bubble Up's bonus round a faint Fat Drac echo. Faint.
At the end, Bubble Up was a pleasant enough slot to review. The base game did drown under a wave of dead-to-meh spins quite often, causing the enjoyment levels to founder. But Bubble Up did step up in free spins, which triggered quite regularly, and the laid-back aquatic environment was agreeable. It's more a fish sandwich snack of a slot than a full seafood meze, but there are opportunities here for the right deep-sea diver to be charmed while chasing a potentially mighty Money symbol haul.
Bubble Up is a pleasant undersea money symbol collect game, though one that often seems to favour a laid-back atmosphere over action.
You'll need your virtual oxygen tank and mask for this one, players, because Bubble Up dives deep to the very bottom of the sea. Down there, a happy-go-lucky octopus sits cheerfully on an Easter Island-style stone head, plant life clings to rocks, and bubbles do their bubbling to the surface thing. It's a jolly place to be, made even more so by a relaxing, there's not a care in the world, Caribbean-inspired tune. With a bit of imagination, you can close your eyes and pretend you're lying in a patch of warm water, all of your responsibilities taken care of, putting all of your worries on hold for a moment. Okay, maybe a lot of imagination is needed to reach that level of zen, but audiovisually, Bubble Up is the type of undersea slot that leans to the relaxing side of the emotional scale.
A bubble-framed play area made up of 6 reels and 5 rows is where the gaming is held. There are 40 paylines, evaluating winning combinations that start from the leftmost reel onwards. The watery depths hide a medium volatile math model, which produces an RTP of 96.52%, though be aware of lower return models. To choose a stake, simply click the minus, plus, or coins icon, where the selection varies from $/€0.20 to $/€240.
From the lowest to the highest value pay symbols, there are four shell symbols, shrimps, seahorses, and four fish symbols. Payout values when landing 6 matching symbols vary from 2.5x to 25x the stake. Wild symbols do not appear in Bubble Up.
Bubbling up from the gameplay depths are a frame feature, free spins, special bets, and a feature buy.
In the base game, a frame of 2x2 to 6x6 in size may randomly appear on the grid. When this happens, the values of any Money symbols within a frame are added together and paid. Money symbols land with values of 0.5x up to the 10,000x Maxi prize. A second frame may also randomly appear on the same spin, and when two frames overlap, any Money symbols in the overlapping area are multiplied by x2 to x10. Money symbols also pay when they create a winning line, up to 5x for 6 OAK.
Hitting 3, 4, 5, or 6 scatters triggers 6 free spins with 1, 2, 3, or 4 modifiers, respectively. Before free spins begin, eight coins appear on the screen. Players click coins to reveal modifier names until two of the same names are revealed, up to the modifier limit of the current round (1-4). After revealing two of the same, that modifier applies to the free spins round. Modifiers include more Money symbols on the reels, more scatters on the reels, starting the round with the frame expanded to 3x3, and two frames on every free spin.
During the round, at least one frame will land on each free spin. When scatters hit, they are collected in a trail above the grid. For every 3 scatters collected, the frame expands one level from 2x2 to 3x3, 4x4, 5x5, up to 6x6. Two free spins are awarded each expansion. If more than 3 scatters are collected on a single free spin, all corresponding upgrades are awarded.
There is one feature buy, and that is free spins triggered by 3+ scatters for 100x the bet. The three special bets are an ante bet for 1.5x, where, when free spins trigger, 2, 3, 4, or 5 modifiers are revealed before the round starts for landing 3, 4, 5, or 6 scatters, respectively. Super Spin 1 costs 20x to guarantee one frame of a random size on every base game spin, or Super Spin 2 costs 100x to guarantee two frames on each spin. Free spins cannot trigger from either Super Spin.
When it comes to slots that take place around the waterline, Pragmatic Play and Reel Kingdom's Big Bass series has cornered a significant segment of the angling slot market. As for slots that dive deep beneath the waterline, the results have been mixed. The last couple, Mermaid's Treasure Trove and Wild Wild Pearls, were okay, a bit middling, which is about how Bubble Up came across, as well. A lot of the time, the game seemed more focused on relaxed presentation than adrenalised excitement. The tranquil atmosphere isn't without its charm, but it took time for anything interesting to occur, and the game might have worked better if it used scatter or cluster pays than paylines on its large playing area.
Trigger free spins and line wins practically fade away to nothingness in importance when compared to trying to net Money symbols in frames. Bubble Up helps out in this phase of play by tossing out a frame on every single free spin - two if you've got the double frame modifier. Even then, Bubble Up felt lacking on the excitement side. Positive moments are of course possible. Money symbols can theoretically land with sizable values, and those caught in overlapping frames also benefit from being multiplied. Bubble Up's win cap is quite enticing, at 10,000x the bet, achievable in one hit, should the Maxi be scooped in a frame. The progression element adds some much-needed suspense, as well, giving Bubble Up's bonus round a faint Fat Drac echo. Faint.
At the end, Bubble Up was a pleasant enough slot to review. The base game did drown under a wave of dead-to-meh spins quite often, causing the enjoyment levels to founder. But Bubble Up did step up in free spins, which triggered quite regularly, and the laid-back aquatic environment was agreeable. It's more a fish sandwich snack of a slot than a full seafood meze, but there are opportunities here for the right deep-sea diver to be charmed while chasing a potentially mighty Money symbol haul.
Bubble Up is a pleasant undersea money symbol collect game, though one that often seems to favour a laid-back atmosphere over action.
