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Big Bass Bonanza — Free Demo & Game Details

Slot game

Slot by Reel Kingdom

#R

96.71%

RTP

Default setting

#MWM

2100x

Maximum win multiplier

#V

high

Volatility

#BR

0.1–250 USD

Bet range

#P

10

Paylines

#GG

5 × 3

Game grid

RTP profiles

Default setting

Base game

Default96.71%

The standard setting of the game. This is the default setting.

Reduced setting

Casino setting

95.67%

Lower setting

Casino setting

94.02%

Our verdict

0xPlaySlots opinion
7.0/ 10our score for this game

The money fish are the best idea in the series and they work because nothing in the base game can touch them. Inside the round the wild count gives the feature a legible shape, and the distance between a dead bonus and a real one is a clean multiple of ten. What holds the score down is everything around that round. There is one feature, a thin paytable and a 2,100× ceiling that cuts the collection ladder off before it can finish its own arithmetic.

About Big Bass Bonanza

The base game is built to display money that nothing in it can collect. Fish land in tall stacks carrying visible values worth between 2× and 2000× the total bet. The fisherman wild that collects those values sits only on the free spins strips. Three bass scatters open the round and the reels switch to a strip set with no scatter on it at all. Wilds are the only route to a longer round from that point. Each one collects every money value on screen and every fourth one adds 10 spins and steps the collection multiplier up. That ladder ends at 10× after the third retrigger and holds a round to 50 spins. Almost the whole return therefore sits in the gap between a bonus with no retriggers and a bonus with three. A single 2000× fish collected at 10× would be worth 20,000×, so the 2,100× ceiling truncates the top of the maths rather than describing it.

Big Bass Bonanza free demo

Launch the provider-hosted demo in a new tab.

Editorial takeaways

  • Three, four or five scatters award 10, 15 or 20 free spins.
  • Every fourth wild collected inside the round adds 10 more free spins and raises the collection multiplier to 2× and then 3× and 10×.
  • The round cannot be retriggered after the third time, which holds it to 50 free spins.
  • A fisherman wild appears only during free spins, so the values sitting on fish cannot be collected in the base game.
  • A round stops the instant its total reaches 2,100× the bet and every remaining free spin is forfeited.
  • The default return is 96.71% and casinos can also run this game at 95.67% or 94.02%.

Limitations and version notes

  • One feature and nothing behind it. There is no second round to reach and no purchase or side bet that changes the shape of a session.
  • The base game is ten lines of playing cards with money values printed on fish that nothing can collect. A run without a trigger decays at full speed and leaves nothing to read.
  • Casinos can run this game at several return settings and 94.02% is one of them. The rules screen shows the one in use, and on a game that pays through a single bonus that gap costs more than any detail of play.
  • The 2,100× ceiling sits barely above the single 2000× value at the top of the fish ladder. A fish that size collected at a raised multiplier is truncated, so most of what it shows is thrown away.

Features & Themes

Game features

Fixed PaylinesCash Prize SymbolsCollecting WildsCollection Multiplier LadderFree SpinsFree Spin RetriggersNo Bonus BuyOperator Configurable Rtp

Themes

fishingfishfishermanWater World

Game mechanics

Ten fixed paylines

Base + bonus#01

Matching symbols land on adjacent reels from the leftmost reel on one of the ten lines.

The line pays its paytable value multiplied by the bet per line.

Nothing carries over to the next spin.

  • The bet per line is one tenth of the total bet.
  • Only the highest win on a line is paid.
  • Wins on separate lines are added together.
  • The ten lines are fixed and cannot be deselected.
  • Wins pay from left to right only.
  • Only the multi-coloured float pays from two of a kind.

Money fish values

Base + bonus#02

Fish land on the reels on any spin.

Each fish takes a random money value that can be won during the free spins round.

A value is redrawn on every spin and nothing carries to the next one.

The same fish is also an ordinary line symbol. Nothing in the base game can turn the printed value into cash.

  • Possible values are 2×, 5×, 10×, 15×, 20×, 25×, 50× or 2000× the total bet.
  • A value is paid only when a fisherman wild collects it.
  • The fisherman exists only in free spins, so base-game values are never collected.
  • The same fish is also a line symbol worth 1×, 5× or 20× the total bet for three, four or five.

Hooked bass scatter

Base game#03

Three or more scatters land anywhere on the reels.

The free spins round starts with 10 spins for three scatters, 15 for four and 20 for five.

The scatters resolve on the spin that lands them.

The scatter has no line pay of its own. It is missing from the free spins reel set, so it cannot land once the round is running.

  • It appears on all five reels in the base game.
  • It cannot retrigger the round.

Fisherman wild collection

Bonus#04

A fisherman wild lands on any reel during the free spins round.

It substitutes for every symbol except the scatter and collects every money value showing on fish.

Each wild that lands is counted for the rest of the round.

Two wilds on the same spin collect the whole screen twice. The wild itself has no line pay.

  • Collected values are paid at the round's current collection multiplier.
  • The fisherman sits only on the free spins reel strips.
  • It never appears in the base game.

Wild retrigger ladder

Bonus#05

Every fourth wild collected during the free spins round.

The round retriggers with 10 more free spins and the collection multiplier moves up one step.

The wild count and the multiplier are kept for the rest of the round.

Retriggered spins are played after the current batch ends. The new multiplier applies to those spins and not to the ones already played.

  • The multiplier runs 1× at the start and then 2×, 3× and 10×.
  • Three retriggers is the maximum, so a round holds at most 50 spins.
  • The 10× step needs twelve collected wilds.
  • The multiplier applies to money collection and not to line wins.

Random money symbol top-up

Bonus#06

A free spin ends with exactly one wild on the screen.

Fish money symbols can appear at random in other positions and that wild then collects them too.

The added symbols belong to that spin only.

The fisherman throws dynamite into the water to place them. It is a random event and not an award for every qualifying spin.

  • It happens only during free spins.
  • It needs exactly one wild on screen at the end of the spin.

Special free spins reels

Bonus#07

Entering the free spins round.

The reels switch to a strip set that carries the fisherman wild and drops the scatter completely.

The special strips stay in play for the whole round including retriggered spins.

Fish arrive in tall stacks because every strip ends in a run of five fish symbols. No scatter can land, so wilds are the only way to extend the round.

  • The base game runs on three identical strip sets with no wild on them.

Maximum-win stop

Base + bonus#08

The total win of a free spins round reaches 2,100× the total bet.

The round ends immediately, the win is awarded and every remaining free spin is forfeited.

The round is over at that point.

A single 2000× money fish collected at the 10× multiplier would be worth 20,000×. The cap truncates that round to 2,100× instead.

  • 2,100× the total bet is the ceiling for the whole game.
  • That ceiling lands about once in 3,880,481 spins.

Bonus rounds

Free Spins

Free spins
10 spins

Three, four or five scatters anywhere on one spin award 10, 15 or 20 free spins.

Every fourth wild collected retriggers the round with 10 more free spins and moves the collection multiplier up one step.

The fisherman wild replaces the scatter on the reels for the round and collects every money value on screen when it lands. The collection multiplier starts at 1× and steps to 2× and then 3× and 10× as each fourth wild arrives. Extra money fish can be dropped in at random when one wild is left on screen at the end of a spin. The round ends when the spins run out or when its total reaches 2,100× the bet.

  • Uses Fisherman wild collection, Money fish values, Wild retrigger ladder, Random money symbol top-up, Special free spins reels, Maximum-win stop.

Event frequency

Maximum-win probability

1 in 3,880,481 spins

Scope
Chance of reaching the 2,100× maximum win

Screenshot Gallery

In-game screenshots

Big Bass Bonanza game screenshot 1
Big Bass Bonanza game screenshot 2
Big Bass Bonanza game screenshot 3
Big Bass Bonanza game screenshot 4
Big Bass Bonanza game screenshot 5

Paytable & Symbol Values

Winning combinations and symbol payouts

Symbol payouts

#PT
Symbol2345
Acelow·0.5×2.5×10×
Kinglow·0.5×2.5×10×
Queenlow·0.5×2.5×10×
Jacklow·0.5×2.5×10×
Tenlow·0.5×2.5×10×
Multi Coloured Floathigh0.5×5×20×200×
Fishing Rodhigh·3×15×100×
Tackle Boxhigh·2×10×50×
Dragonflyhigh·2×10×50×
Fishhigh·1×5×20×

Multi Coloured Float. The highest line payer and the only symbol that pays from two of a kind.

Dragonfly. Pays exactly the same as the tackle box.

Fish. Pays as an ordinary line symbol and carries a random money value at the same time. It sits in a stack of five at the end of every reel strip.

Values are multiples of the total bet. In multiples of the bet per line, every value is ten times higher because the total bet is ten times the bet per line.

Special symbols

#SS
Hooked bass scatter
It appears on all five reels and pays nothing itself. Three, four or five scatters award 10, 15 or 20 free spins.
Money fish
Every fish takes a random value from a fixed ladder that runs from 2× the total bet up to 2000×. Those values are paid only when a fisherman wild collects them during free spins.
Fisherman wild
It is present only on the free spins reels and has no line pay. It substitutes for every symbol except the scatter and collects all money values on screen.

Our Team Reviews

Signed reviews from our team

1 review
FEATURED

Big Bass Bonanza builds a 10× ladder under a ceiling sized for its bottom rung

SC

Sarah Chen

Streaming Specialist at 0xPlaySlots

September 14, 2026
7.0/10

The fish are the idea and the ceiling undoes it

Big Bass Bonanza is a counting game with one very good rule and one badly sized number. The rule is that a money fish is worth nothing until a fisherman wild collects it, and every fourth fisherman adds ten spins whose collections pay at a higher multiplier. Sitting over that rule is a 2,100× ceiling. I read the collection ladder as the best thing in the game and the ceiling as sized for that ladder's bottom rung, so the round the ladder is built to produce is exactly the round the game will not pay in full. What remains is a good slot with one real strength and a frame too small for it.

It is also the template for its series, and the later entries show where that frame was thin. Bigger Bass Bonanza is a direct follow-up on the same money fish and the same collecting fisherman. The Megaways build runs the same fisherman collection during free spins. Big Bass Splash keeps the loop and adds an extra multiplier level and a bonus buy. None of those successors replaced the fish, which I take as the clearest sign the central idea was right from the start. The buy in Splash answers this game's plainest limit: the scatter is the only way into the only feature.

The line pays are a waiting room

I count ten line symbols and only five distinct pay rows. All five card royals pay 0.5× the total bet for three, 2.5× for four and 10× for five. Tackle box and dragonfly are one pay row printed twice, at 2×, 10× and 50×. Eight of the ten symbols return 2× or less for three of a kind, and six of them top out at 20× or less for five. Only the multi-coloured float, at 200× for five and with the lone two-of-a-kind pay of 0.5×, gives a line any reach, and the fishing rod behind it stops at 100×.

Fish are where the base game looks busiest and pays least. Every reel strip ends in a stack of five fish, so a screen full of them is the base game's signature outcome. It pays 20× on each of the ten lines, 200× the bet, while showing up to fifteen money values between 2× and 2000× that nothing can collect. On paper the paytable's arithmetic ceiling is ten lines of five floats, 2,000×, and that is the only place the lines approach the cap, because it needs every position on the screen to pay as a float.

None of this is an accident. The base game exists to deliver scatters, and the printed fish values give the wait a point by showing what the round could collect. Between triggers, though, the table has nothing to offer beyond card pays, and no side feature interrupts it.

Twelve wilds decide the round

Once the round opens, the scatter is gone from the reel strips and the fisherman is the only symbol that collects money or extends play. Each one takes every money value on screen at the current multiplier, and two on the same spin collect the screen twice. Every fourth wild adds ten spins and a rung: 2× at four wilds, 3× at eight, 10× at twelve. Line wins inside the round are untouched by any of it, because the multiplier applies to collection only.

That ladder's shape is the best decision in the game. Its first two steps add one to the multiplier each. From 3× to 10× the third step more than triples it, so the top rung alone pays more per fish than the three below it combined, since 10 exceeds 1 + 2 + 3. A 50× fish is worth 50×, 100×, 150× and then 500× as the count climbs. I find that legible: the wild count tells at every moment what the rest of the round can become, and a round that reaches twelve pays ten times as much per fish as one that never retriggers.

Spin counts follow the same arithmetic. Three retriggers add thirty spins to whatever the scatters awarded, so the 50-spin maximum belongs to a five-scatter start. A three-scatter round tops out at 40 and a four-scatter round at 45. Extra starting spins do not move the ladder; they only give the wilds more spins in which to arrive. The dynamite top-up can rescue the weakest spin in the round, a lone wild on a screen with no fish, by dropping fish in at random for that wild to collect. Because it needs exactly one wild, it never adds to a spin that is already collecting twice.

The ceiling was sized for the bottom rung

The largest fish value is 2000× and the ceiling is 2,100×. At 1×, a 2000× fish fits under the cap with 100× to spare. On every rung above it, the same fish is cut down:

Rung2000× fish collectedShare the cap can pay
1×2,000×all of it
2×4,000×52.5% at most
3×6,000×35% at most
10×20,000×10.5% at most

Rare top fish are not the whole problem. At 10×, a single fisherman collecting 210× of face value ends the round, and 210× is four 50× fish and one 10× fish. Two wilds on one spin need only 105× between them. Whatever spins remain are forfeited at that point. The rung that takes twelve wilds to earn, and that the entire ladder is shaped to deliver, has room for one strong screen before the game shuts it, less whatever the round had already banked.

The cap is almost invisible in the return. The 2,100× outcome arrives about once in 3,880,481 spins, and 2,100 divided by 3,880,481 is about 0.054% of stake. Of the 96.71% default return, the ceiling round supplies roughly a twentieth of a percentage point. Everything else comes from rounds that never touch it, so the cap does almost nothing to the maths of an ordinary round and a great deal to the best one.

For counters, not ceiling-chasers

This game suits a player who wants a bonus round readable at a glance and accepts that its best version pays 2,100× the bet. The wild count gives every free spin a stake in the next one, and the money fish give the base game's waiting a point.

Anyone who needs the base game to hold interest on its own should look elsewhere, since eight of ten symbols pay 2× or less for three and nothing interrupts the lines. Ceiling-chasers should pass too: a single 2000× fish at the 2× rung already produces more than the cap can pay. Big Bass Splash is a later entry in the series with a bonus buy and another multiplier level; this one offers the scatter and nothing else.

Of every setting in this game, the return matters most. The default 96.71% leaves a house edge of 3.29%. At 95.67% it is 4.33%, and at 94.02% it is 5.98%, about 1.8 times the default. That 2.69-point gap is roughly fifty times the entire contribution of the 2,100× round. On a game that pays almost entirely through one feature, the rules screen is the first thing I would check.

Pros

  • Money fish pay only when a fisherman collects them, which gives the round a clear purpose
  • The ladder is readable: four, eight and twelve wilds mark 2×, 3× and 10×
  • The 10× top rung pays more per fish than the three rungs below it combined
  • The dynamite top-up can rescue a lone wild on a screen with no fish

Cons

  • The 2,100× cap keeps at most 10.5% of a 2000× fish collected at 10×
  • Ten symbols share five pay rows, and eight pay 2× or less for three of a kind
  • One feature, no buy and no second round, so the scatter is the only way in
  • The 94.02% setting carries about 1.8 times the house edge of the default

Verdict

The money fish and the twelve-wild ladder give Big Bass Bonanza a round worth understanding, and that idea carries the game. One feature, a thin paytable and a 2,100× ceiling sized for the ladder's bottom rung keep it good rather than excellent.

#GP

Game Provider

#GD

Game Details

Information

Reel Kingdom
December 14, 2020
Big Bass Series
Video Slot
Fixed Payline Slot
10 paylines