Why does a winning symbol vanishing from the reels feel like a small loss?
Because in a cascading slot, that is exactly what it is. You land a cluster, it pays, and then the symbols you liked are deleted and replaced by whatever the game feels like dropping next. Bonanza Billion Merge Up, BGaming’s new release in its #Entertainment series, changes that one detail: instead of every winning symbol disappearing, the symbols merge and leave one of their own kind behind on the grid. That single change is the whole pitch, and it is the reason the game is worth understanding rather than just spinning.
Everything below explains the mechanic, the published specs, and where merge features sit relative to wilds, scatters and free spins. No talk of what you might win, because nobody can tell you that.
What are merge mechanics in slot games
A merge slot mechanic is one where symbols involved in a win are combined rather than simply removed. The game resolves the win, then replaces the cluster with a single surviving symbol of the same type, which stays in play for the next drop. Collect-style features work on a related idea: the game keeps track of something across rounds instead of wiping the slate clean every time.
That is the meaningful difference from the two mechanics most players already know:
- Fixed paylines evaluate one static screen. Symbols pay along set lines, the round ends, everything resets.
- Cascading (tumbling) reels remove winning symbols and drop new ones into the gaps, letting one spin pay several times. But each cascade destroys the symbols that made the win, so the grid drifts back towards random.
- Merge mechanics keep a seed of the previous win on screen. The board carries information forward within the round.
Providers have been leaning into this kind of persistence for a while now. Hold-and-win grids that lock symbols in place, collect features that bank multipliers, sticky wilds that survive a respin, all of them share the same design instinct: players engage more with a board that remembers something than with one that resets. Merge mechanics are the tidiest version of that idea, and they borrow their visual language from mobile merge puzzle games, which is presumably not an accident.
Bonanza Billion Merge Up: game overview
Bonanza Billion Merge Up (officially Bonanza Billion Merge Up+) is BGaming’s combination of two things it already owned: the look of the original Bonanza Billion and a revised build of its Merge Up mechanic. The Merge Up feature is not brand new to the studio. What is new is the reworked version, which BGaming says it tuned using feedback from players and streamers specifically to fix the “my symbols keep vanishing” problem in cascade-style play.
Theme and visual design
Fruits and gems, brightly lit, with the same candy-shop palette the series has used since the original launched five years ago. BGaming credits that fruit-and-gem design, alongside the series’ reward dynamics, for Bonanza Billion becoming one of its better-known titles. If you have played any of the fruit themed slots in this family, the visual grammar will be immediately familiar, which is the point of a sequel.
Practically, the art style does some work for the mechanic. Merges need to be legible at speed, and chunky, high-contrast fruit symbols are easier to track than ornate ones when three of them fold into one.
Technical specifications
Here is what BGaming has published about the game. Check the in-game info panel for the bet range your operator serves, since that can vary by market and configuration.
| Specification | Detail |
|---|---|
| Provider | BGaming |
| Series | #Entertainment / Bonanza Billion |
| Theme | Fruits and gems |
| Core mechanic | Merge Up (revised version) |
| Volatility | Very high volatility math model |
| Bonus round | Free spins with multipliers up to 100x |
| Buy Bonus | Available at 100x the stake |
| RTP | 97.04% |
Very high volatility is the specification that matters most for expectations. It means payouts are distributed unevenly: longer stretches of nothing, punctuated by rarer larger hits. It does not mean the game pays more overall. Volatility describes the shape of the distribution; RTP describes the long-run average return, and the gap between RTP and 100% is the house edge that applies regardless of how the symbols behave.
How the Merge Up feature works
Step by step, this is the loop:
- You spin and the grid fills with fruit and gem symbols in the usual way.
- A win is formed and paid according to the paytable.
- Instead of the winning symbols being removed, they merge. The cluster collapses into a single symbol that was already present on the reels, rather than being replaced by a random newcomer.
- The merged symbol stays in play for what follows, so the board is not reset to pure chance.
- Weighting shifts with the board. BGaming’s description is blunt about this: the more identical symbols already in play, the higher the chance that same symbol is what comes out of a merge. Composition feeds back into composition.
- Free spins layer multipliers on top. The bonus round uses multipliers of up to 100x, and there is a Buy Bonus option priced at 100x your stake if you would rather not wait for the trigger.
Point five is the interesting one. In a standard cascade, every drop is independent of what came before, so there is no momentum, only the illusion of it. Merge Up builds a genuine feedback loop inside the round: a board that has accumulated a particular symbol is more likely to keep producing it. That is a real mechanical difference, not a presentational one.
Worth being clear about the limits, though. This changes how outcomes are distributed within a round; it does not change the fact that the game’s maths model is set by the provider and the house edge is baked in. Nor does it give you a decision to make. There is no cash-out, no hold button, no skill input. You choose your stake and whether to buy the bonus, and the RNG does everything else.
On the Buy Bonus: 100x is a large, upfront cost that trades patience for variance. It does not tilt the odds in your favour. Bought bonus rounds run on their own configured maths, and paying to skip ahead is simply a faster way of putting money through a game with a house edge.
Merge mechanics vs traditional slot features
Wilds, scatters and free spins all modify a single evaluation of the screen or hand you a set of extra rounds. Merge mechanics act on the board’s composition itself. Side by side:
| Feature | What it does on screen | Effect on what comes next |
|---|---|---|
| Wild | Substitutes for other symbols to complete a win | None, unless the wild is sticky or expanding |
| Scatter | Triggers a feature regardless of position | Starts a bonus round, then the base game resumes as normal |
| Free spins | Grants rounds with no extra stake, often with multipliers | Contained within the bonus; the base game is unchanged |
| Cascading reels | Removes winning symbols, drops new ones in | Fresh random symbols, no memory of the win |
| Merge (Merge Up) | Combines winning symbols into one that was already on the grid | The surviving symbol stays and influences merge outcomes |
For players, the practical difference is attention rather than strategy. With wilds and scatters you are watching for specific symbols to show up. With merge mechanics you end up reading the whole board, because the mix of what is sitting there is what shapes the next merge. It makes the round feel like it has a state you can follow. Just do not mistake following it for influencing it.
Other slots using merge and collect mechanics
This is part of a broader shift in new slot features rather than a one-off. Cascading reels, cluster pays and Megaways-style variable win counts all pushed slots away from the static payline, and persistence mechanics are the next step: hold-and-win grids that lock cash symbols across respins, money collect features that sweep values into a single symbol, sticky wilds and upgrading symbols that carry between free spins. Several studios now run some version of a collect feature, and merge variants have appeared across different providers’ catalogues under different names.
The reason is straightforward. A board that changes state gives designers more knobs to turn and gives players more to watch during a spin that would otherwise be over in two seconds. Expect more of it, and expect the marketing around each one to claim it is entirely unlike the others.
If you want the underlying ideas in more depth, our guide to how slot mechanics work covers RTP, volatility and hit frequency, and our overview of BGaming’s slot portfolio puts this release in context with the studio’s other titles.
FAQ
How does the merge mechanic work?
Winning symbols combine instead of disappearing, leaving behind a single symbol of a type already on the grid. Because that symbol stays in play, and because merges are more likely to produce symbols already present, the board’s composition carries forward within the round.
What is Bonanza Billion Merge Up?
A fruit and gem themed slot from BGaming in its #Entertainment series, built on a very high volatility maths model with a stated RTP of 97.04%. It pairs the Bonanza Billion look with a revised Merge Up feature, free spins carrying multipliers of up to 100x, and a Buy Bonus option at 100x the stake.
How do you play merge slots?
Exactly as you would any other slot: set your stake and spin. The merge behaviour is automatic and there are no decisions to make once the reels are moving, so the only meaningful choices are bet size and how long you play.
Does the merge feature improve your odds?
No. It changes how wins are shaped and sequenced inside a round, not the game’s long-run return. Every slot keeps a house edge, which is 100% minus its RTP, and no mechanic removes it.
Play for entertainment only, set a deposit or loss limit before you start, and use the cool-off and self-exclusion tools your operator provides if play stops being fun. Slots are designed to return less than they take over time, which is worth remembering whichever mechanic is on the reels.