Susu & Koko Slot by Pragmatic Play

Cute Bears, Serious Math

Susu & Koko pairs a pastel kawaii aesthetic with Pragmatic Play's scatter pays engine on a 6x5 grid. Two cartoon bears - a white one (Susu, milk) and a brown one (Koko, cocoa) - sit beside reels filled with strawberry bowls, cakes, smoothie cups, carrots, and dumbbells. The visual tone screams casual mobile game. The math does not.

Nine regular paying symbols need at least 8 copies anywhere on screen to award a win. No paylines, no clusters - pure scatter counting across all visible positions. The highest-paying character symbol returns 1,000 coins for 15 or more on screen, while the lowest food symbol pays just 50 coins at the same count. That gap between top and bottom symbol values is wide, and you feel it during dry stretches.

The Locked Row That Changes Everything

Above the standard 5-row grid sits a locked 6th row with six heart-shaped positions. Each position unlocks left to right as tumbles chain during a single spin sequence. First tumble opens reel 1. Three more tumbles unlock reel 2. Then six, nine, twelve, and fifteen cumulative tumbles for reels 3 through 6.

Those thresholds are steep. Getting past reel 3 requires six consecutive winning tumbles from a single spin, which is uncommon in the base game. But each unlock adds one more symbol position to the grid, pushing the total from 30 to a maximum of 36. More positions means more potential symbol matches on the scatter pay system, which means bigger wins feeding into even more tumbles. When the chain gets going, it compounds.

Unlocked positions stay open until the entire tumble sequence finishes. In free spins, they persist for the whole round.

Multipliers: Single-Use vs. Persistent

Multiplier symbols land on any reel during spins and tumbles. Their value is random from a pool that starts at 2x and goes all the way to 500x. That upper end is extreme for a Pragmatic Play slot.

In the base game, multipliers work additively. When the tumble sequence ends with no more wins, all multiplier values visible on screen get added together. The combined total multiplies your entire sequence win. Land a 50x and a 30x during the same chain, and your final payout gets an 80x boost. Solid, but one-and-done.

Free spins flip the script. Every multiplier that appears adds to a running total that carries across all 10 spins (plus any retriggered sets of 5). A 20x on spin one, a 15x on spin three, and a 100x on spin seven means spin eight starts with a 135x multiplier applied to every single win. This accumulation is how the game reaches its 5,000x cap - long free spin rounds where multipliers stack into triple digits while the expanding grid feeds symbol matches.

Free Spins, Buy Options, and the Ante Trade-Off

Four scatters trigger 10 free spins. Five and six scatters also trigger the round but award larger scatter pays (300 and 2,000 coins respectively). During free spins, 3 or more scatters add 5 extra spins.

The locked row resets at the start of free spins. Every tumble across the entire round counts toward unlocking positions, and once opened, they stay open. Combined with persistent multipliers, extended free spin rounds build serious momentum.

Buying the feature costs 100x your total bet and forces 4, 5, or 6 scatters on the triggering spin. At a $2 bet, that is $200 per purchase. The ante bet option increases your stake by 25% (a $2 bet becomes $2.50) for higher scatter frequency, but caps the maximum win at 4,000x instead of 5,000x and disables the buy feature while active. That 20% max win reduction is easy to overlook when the ante feels like it is speeding up scatter hits.

Probability of hitting the 5,000x cap sits at roughly 1 in 2.17 million spins in normal play. With ante active, the 4,000x ceiling hits at about 1 in 1.47 million. Marginally better odds for a lower payout - pick your poison.

RTP across all three modes lands within a hair of 96.07-96.08%. Operators configure between three tiers: 96.07%, 95.09%, and 94.09%. The tier your casino runs is not always obvious.