How Mogu grows: five stages of Rampage in Kaiju Snack

Mogu is the harbour kaiju in Kaiju Snack. We give him a job that connects the character to the rules: he eats the winning clusters. During Rampage free spins, those removed symbols also fill his belly. As the count rises, he moves through five growth stages, and the multiplier rises with him, from ×1 to ×10.

The important parts are what we count, when growth takes effect and what the meter represents. Together they explain why Mogu can keep eating during a spin without changing that spin's multiplier.

What counts as a snack

Kaiju Snack has a 6×5 board. A cluster pays when at least five identical symbols connect horizontally or vertically. We remove all paying clusters together, send their symbols into Mogu's mouth, let the remaining symbols fall and fill the spaces from above. The board keeps tumbling until there is no new paying cluster.

In Rampage, one removed cell is one snack. We count cells, rather than the number of clusters or the amount they pay. That distinction matters for Golden Fish Wilds. A Wild can join several paying clusters at once, but it leaves the board once, so it fills the belly once. A group made entirely of Wilds does not pay.

Kaiju Alarms are outside that count: they never pay and Mogu never eats them. The belly measures the symbols removed by paying clusters. It does not measure everything that landed on the board. In the presentation, we advance the belly as each removed symbol reaches Mogu, keeping the count attached to the action that caused it.

Five stages, applied between spins

We use cumulative snack thresholds for the growth ladder:

• Stage 1: starts at 0 snacks, with ×1.
• Stage 2: reached at 55 snacks, with ×2.
• Stage 3: reached at 130 snacks, with ×3.
• Stage 4: reached at 185 snacks, with ×5.
• Stage 5: reached at 240 snacks, with ×10.

Snacks carry across every tumble and free spin in that Rampage. Reaching a mark does not empty the belly. Growth applies after the spin, so all the paying clusters in the spin that crosses a threshold use the multiplier that was active when it began. Later spins use the new stage.

Each stage-up adds two free spins. If a spin crosses several thresholds, we apply the growth steps in order. We give the change its own moment: Mogu grows, the stage and multiplier readouts update, and the added spins appear. That order lets the screen explain the rule without changing a multiplier halfway through a tumble sequence.

Rampage has no separate cascade multiplier. The growth stage supplies the multiplier throughout each free spin. Once Mogu reaches stage 5, the ladder ends at ×10.

One meter for the whole Rampage

We draw the belly as a meter from zero to the final threshold, with a mark at each growth threshold. The fill uses the cumulative count, and the marks sit in proportion to their snack totals. The space between stage 2 and stage 3 is wider than the spaces between the later stages because the thresholds are uneven.

That makes the display a picture of the rules. An equally divided bar would give those different intervals the same width. A bar that emptied after each growth would hide the total already collected. We keep the whole ladder visible instead, with the current stage and multiplier beside it. At the final threshold the fill is full; the multiplier remains ×10.

We also chose the thresholds alongside the two buy modes. Our math notes record the reason for this particular ladder: Rampage and Mega Rampage needed to use the same free-spin rules at their respective costs. The thresholds connect those starting positions to the same later growth steps. The meter displays that shared structure.

Two entries on the same ladder

The Rampage buy costs 100× the base bet and starts directly with ten free spins. Mogu begins at stage 1, with ×1 and an empty belly.

Mega Rampage costs 400× the base bet and starts with twelve free spins at stage 3, with ×3. We initialise its belly at 130 snacks, the threshold for that stage. Its meter therefore begins at the stage 3 mark. Both entries then follow the same thresholds and growth rules.

These are starting conditions. Reaching the top stage is not guaranteed, and a multiplier does not say what symbols the next spin will contain. The meter records progress inside the current feature; it cannot forecast a session. Every mode has a theoretical RTP of 96.50%, a long-run average rather than a prediction for an individual session. We explain that distinction in how we test a slot's math.

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