Sumo Sumo (ELK Studios) – Review & Demo Play

Sumo Sumo: Slot Overview

Sumo Sumo plants me in a Japanese backstreet, the reels set in a graffiti specked alley rather than a roaring arena. It plays on a 5x5 grid with 259 ways to win, where wins form from the leftmost reel by connecting symbols on adjacent reels, horizontally or diagonally. The flow suits mobile or desktop. The tone is arcade like, with chunky, square fruit and two sumo wrestlers driving most of the action. It looks playful, but the rule set hides plenty of bite.

Most spins revolve around Wild Sumo Stacks that form, walk, and collide in brawls, throwing multipliers around the grid. Then there is the Speedboat Bonus, which flips the board into a line of sight collection round that can chain across the screen. Free spins keep stacks on the reels, so momentum builds between spins. Put together, it feels like a mash up of walking wilds, respins, and a quirky collector, all wrapped into a compact 5x5 set up.

Sumo Sumo Symbols and Paytable

Low pays are square fruit: cherries, grapes, lemon, and watermelon, worth 0.5x to 2x your bet for five of a kind. High pays are the blue and red sumo wrestlers, paying 5x and 10x for five. A red W is the wild, substituting regular pays, while a neon Free Spins tile is the scatter. The yellow and black Speedboat Bonus sign triggers the collection round. Lines connect from the leftmost reel on adjacent reels, including diagonal steps.

Sumo Sumo Symbols and Paytable

Symbol	Quantity	Payout
	5	x10
	4	x1.5
	3	x0.75
	5	x5
	4	x1
	3	x0.5
	5	x2
	4	x0.8
	3	x0.4
	5	x1.5
	4	x0.6
	3	x0.3
	5	x1
	4	x0.4
	3	x0.2
	5	x0.5
	4	x0.2
	3	x0.1
	Bonus
	Scatter
	Wild

Sumo Sumo: Slot Features

Adjacent sumo symbols can jump onto one position to create a Wild Sumo Stack when a win hits, or they can pile onto an existing stack of the same type. Each stack occupies a single tile, turns wild, and carries a multiplier equal to the number of sumos inside it. Get more than one Wild Sumo Stack involved in a win and their multipliers apply multiplicatively, which is where the grid starts to hum. Multiple stacks can form off the same connection when routes split.

Whenever a stack is created, a respin is awarded and the stack walks one step to the right. Reaching the rightmost reel makes it turn and trudge back to the left. In the base game, stacks spin off when they march past reel one, or when a respin lands with no win and no stack addition. Horizontally adjacent matching sumo symbols that land next to a stack will hop aboard, growing the multiplier and keeping the reel to reel shuffle going.

During a respin, if opposite Wild Sumo Stack types end up on the same row, the one on the right charges the one on the left for a brawl. The larger stack wins and its multiplier is multiplied by the value of the losing stack, while the loser is removed. If they are equal, a winner is picked at random. A brawl can also flip the direction of the surviving stack. It is chaotic in the best way and can turn a decent line into something proper chunky.

Speedboat Bonus in Sumo Sumo

Land three Speedboat Bonus symbols to start the Speedboat Bonus. You get three spins on a 5x5 grid with a Speedboat that holds an x bet value. The boat can see horizontally and vertically from its current position. If a new symbol lands in its line of sight, spins reset to three and the boat zooms to collect it. From the new stop, it will keep collecting as long as another target sits in view, creating satisfying chain routes.

Collected symbols do the work. Swimmer Sumo adds its value to the boat. Wakeboarder Sumo adds, then attaches, with a counter that increases every time the boat moves a position. Ramp multiplies both the boat’s x bet and the wakeboarder counter. Harpoonist adds and increases the value of uncollected Swimmers or Wakeboarders; Turbo Harpoonist also bumps those values each time the boat collects. The feature ends after three dead spins, paying the boat’s total plus any wakeboarder tally.

Free Spins and X-iter in Sumo Sumo

Two scatters award six free spins. Here, Wild Sumo Stacks stay in place between spins and do not spin off on a loss or when they reach reel one, which lets multipliers climb across the round. Land two scatters again and you get another six. If available, X iter offers tailored entries: Bonus Hunt, Brawl Mode, Speedboat Bonus, Super Speedboat Bonus, and straight into Free Spins. Handy if you prefer jumping to the meat of it.

RTP and Max Win in Sumo Sumo

The maths is spiky. RTP sits at 94% on a single model, volatility is high, and the max win is 25,000x. Stakes range from 20p up to £100 a spin. It is not a straight ways engine either; wins start from the leftmost reel and connect on adjacent reels, including diagonal steps. In practice, the big swings tend to come from stacked multipliers in free spins or a Speedboat route that strings several multipliers together.

Sumo Sumo: Slot Verdict

I have had the best results in free spins. With stacks sticking around, multipliers pile up, brawls thin the herd, and the grid keeps serving respins to squeeze value from modest lines. In the base game, stacks often drift off before anything erupts, though the odd brawl can still light things up.

The Speedboat Bonus feels fresh. Line of sight paths that reset lives and chain through Ramps, Harpoonists and a greedy Wakeboarder make for tense moments as the route unfolds. Quirkier, yes, but the sticky stacks carried more weight for me over time. Low RTP is a drag, yet the 5x5 set up and wandering wild stacks kept me spinning longer than I had planned.