Boombear Bros: Fire, Ice and Cell Multipliers

Boombear Bros is a Bullshark Games slot released on 23 September 2026, a 6x6 cascading cluster game set on a frozen tundra. Two bear brothers, both explosives experts, throw Power Bombs onto the grid.

Every win cascades, and the bombs do the heavy lifting. Fire Power Bombs write multipliers into the cells they hit, while Ice Power Bombs fill their blast zone with matching symbols to build clusters.

In the two free spins bonuses the cell multipliers stop resetting between spins, and in Maximum Blast every bomb explodes in all four directions.

Bullshark Games lists the RTP as 96.32, 94.36, so the game is offered in two versions: one at 96.32% and one at 94.36%. The RTP stated in the game's rules shows which version is running.

Volatility is rated 3/5, the middle of the provider's scale, and the hit rate is listed as 27.39, 27.29, a little over one winning spin in four in either version.

The max win is 12,000x (€900,000 or equivalent in other currencies, based on €75 bet). Bullshark Games' wording here differs slightly from its other recent releases: it says the max win can be achieved in all bonus game modes. Default bet levels are 0.10 - 75, from €0.10 to €75.

The product sheet lists Grid multipliers, Wild symbols, Symbol Converters and Free Spins, and the game is translated into 27 languages. Bullshark Games does not state the minimum cluster size on its page; the in-game paytable has it.

Every Power Bomb has a random direction and a random length. Horizontal blasts travel left and right, vertical blasts travel up and down, and cross blasts travel all four ways. The length, 1, 2, 3, 4 or 5, sets how many cells are hit in each direction.

The edge of the 6x6 grid cuts blasts short, so a bomb near a wall reaches fewer cells on that side, or none. As an illustration of the published rules, a cross bomb of length 5 reaches the whole of its row and column wherever it lands, 11 cells including its own.

Power Bombs can land in the base game and in the bonuses, and the Bomb Frenzy event can add them too. They come in two types, Fire and Ice, which behave very differently.

A Fire Power Bomb adds a multiplier to every cell in its blast, including the cell it landed on. All the cells hit by one bomb get the same value, picked from 2x, 3x, 4x, 5x, 6x, 7x, 8x, 9x, 10x, 15x and 20x. The multipliers go in straight after the spin or cascade, so they are active for the next win calculation.

Several Fire Bombs can sit on the grid at once. They fire from left to right and top to bottom, each with its own value, and where two blasts overlap the values are added together. The bomb then turns into a random paying symbol or a Wild.

A cell multiplier applies to any win that includes a symbol in that cell. If a cluster covers several multiplier cells, their values are added together and then applied, so as an illustration, a cluster touching a 5x cell and a 10x cell pays at 15x.

Cells start with no multiplier, and only Fire Bombs raise them. In the base game they build through every cascade of a spin and reset when the next spin starts.

An Ice Power Bomb waits until the grid has settled and no wins remain, then fills its blast zone with matching symbols. Any symbol in the paytable can be added, the Wild included. Other bombs, existing Wilds and FS Scatter symbols are left untouched.

When several Ice Bombs fire, they go left to right and top to bottom and all add the same symbol type, although each bomb decides separately whether to add Wilds. The bomb then turns into the symbol it added. Because it waits for the cascades to stop, it works on a grid that has nothing left to pay.

The Wild substitutes for every symbol in the paytable. It can land on its own in the base game and the bonuses, or arrive through an Ice Bomb or a Fire Bomb's transformation.

Bomb Frenzy is a mystery event. On a random spin with no wins and no Power Bombs on the grid, it can add 2, 3, 4 or 5 bombs of either type, never on top of Wilds, other bombs or FS Scatter symbols.

3 FS Scatter symbols start Bombs Away with 10 free spins. It keeps the base game's rules with one major change: cell multipliers are progressive until the bonus ends, so values written by Fire Bombs stay and keep adding up from spin to spin.

4 FS Scatter symbols start Maximum Blast with 12 free spins. It has the same progressive cell multipliers, and every Power Bomb explodes in all four directions, so each Fire Bomb can reach more cells than a single-direction blast of the same length.

In both bonuses each FS Scatter symbol adds +1 free spin. The spin is added before wins are counted, and the Scatter then turns into a regular paying symbol, never a Wild. Cell multipliers from the triggering spin do not carry into the bonus, so every feature starts with no cell multipliers.

The free Boombear Bros demo on this page is the place to read the rules Bullshark Games leaves out: the minimum cluster size and the symbol payouts. Then watch where Fire Bombs land, because edge positions cut blasts short and central ones reach more cells.

In the bonuses, track the multipliers building on the grid rather than single wins, and note how often Ice Bombs finish a spin with a cluster. Bullshark Games does not list a bonus buy among the game's features, so both bonuses come from FS Scatter symbols. A demo session shows how the mechanics behave, not what any future spin will pay.

Other Bullshark Games titles covered on Slotscritic: Doctor Dust, Joker Never Retires and Blood Rebels.

What is the RTP of Boombear Bros?

Bullshark Games lists Boombear Bros' RTP as 96.32, 94.36, so there are two versions of the game: one returning 96.32% over the long run and one returning 94.36%. The RTP stated in the game's rules shows which version is running. The listed hit rate is 27.39 and 27.29 for the two versions.

What is the max win on Boombear Bros?

The max win is 12,000x (€900,000 or equivalent in other currencies, based on €75 bet). Bullshark Games says it can be achieved in all bonus game modes. In the free spins bonuses, cell multipliers from Fire Power Bombs, worth 2x to 20x per blast, stay on the grid and add up until the feature ends.

How do you trigger free spins in Boombear Bros?

Land 3 FS Scatter symbols to start Bombs Away with 10 free spins, or 4 to start Maximum Blast with 12 free spins, where every Power Bomb explodes in four directions. In both, cell multipliers are progressive until the bonus ends and each further FS Scatter symbol adds +1 free spin.

What do the Power Bombs do in Boombear Bros?

Each Power Bomb explodes horizontally, vertically or in a cross, with a length of 1 to 5 cells per direction. Fire Power Bombs add a 2x to 20x multiplier to every cell in the blast. Ice Power Bombs wait until the grid settles, then fill the blast zone with matching symbols, sometimes Wilds, to create new clusters.

Is Boombear Bros a high volatility slot?

Not by Bullshark Games' rating. It scores Boombear Bros 3/5 for volatility, the middle of its scale, with a listed hit rate of 27.39, 27.29, so roughly one spin in four wins. The 12,000x max win is still on offer, and the provider says it can be achieved in all bonus game modes.

Can you play the Boombear Bros demo for free?

Yes. The Boombear Bros demo on this page runs on play credits, so you can watch Fire and Ice Power Bombs, Bomb Frenzy and both bonus games without staking money. It is the same 6x6 cascading cluster game that Bullshark Games released on 23 September 2026. The provider does not list a bonus buy.