Explore the Slots Universe
Quick links

Slime Bonanza

RTP 96.31% Volatility Medium Max Win 12,500x
More From Belatra

Slime Bonanza Stats

Provider Belatra·Released June 2026
RTP
96.31%
Volatility
Medium
Max Win
12,500x
Paylines
20
Reels
5x4
Min Bet
0.20
Bonus Round
Yes
Scatters
Yes

Reviewed by Richard Andrews · stats verified in-game 11 Sep 2026


About Game

Play Slime Bonanza

A Table the Aliens Cash In

A pug is beamed off a country road, radioactive slime oozes down the reels, and the big-win screens show a man and his dog screaming at the sky. Slime Bonanza fully commits to its noisy alien-invasion theme, but beneath the chaos, Belatra has a distinctive mechanic. Green-slimed symbols light cells on the Instant Win Table beside the grid, while a tentacled Collector cashes them in, sweeping up the lit cells and stacking their values as it moves down a reel. The biggest rounds come when a Collector lands with the table still lit, and a quick look at the rules beforehand makes the feature much easier to follow.

Inside the Invasion

Green Cells and the Instant Win Table

The Instant Win Table sits beside the reels, with 15 cells ranging from 1x at the bottom to 5000x at the top. Any symbol can land coated in green slime, activating the cell beside its position, starting with the lower values and working upwards. The top three rewards need repeat activations: 500x unlocks after three green hits, 1000x after four and 5000x after five. Slimed symbols still pay like regular symbols, so each one can contribute to a line win while lighting another cell on the table.

The Alien Collector

The tentacled alien is the only symbol that turns lit cells into credits. When a Collector lands, it chooses a lit cell at random, adds the value to a running total, then moves down one row and collects again. It continues down the reel until it reaches the bottom or there are no lit cells left, before becoming a Wild for the rest of the spin.

If more than one Collector lands, they activate in the order they appeared. The key point is that lit cells have no value on their own, even when the table is full. A Collector must land before any of them pay.

A pink alien Collector symbol on the reels beside the lit Instant Win Table When this alien lands, the lit cells stop being decoration and start paying.

The Red Hole Between Wins

The Red Hole can appear mid-spin but waits until any paying wins have been counted. It then swallows every symbol except Wilds, Scatters and other Red Holes, before dropping replacements into the empty spaces to keep the spin moving. It awards nothing on its own, but it can refresh a stalled grid and create another chance to land a win.

Red Hole symbol on the grid during free spins, with wilds locked in the top corner The Red Hole appears on reel 1, ready to clear the grid around the wild block.

The Free Games and What Warms Them Up

Three, four or five UFO scatters award 10, 12 or 14 free games, and five also open Hot Mode with greens. Any scatter that lands mid-round adds one more, up to a run of 50.

Everything else behaves as it does in paid play, and cells you lit earlier carry over and roll from one game to the next.

Hot Mode starts with every cell active, and in the green version, new slime keeps waking spent cells, the best route to the top prize.

The Buy That Spends Each Cell Once

There are three bonus buys: standard Free Games cost 100x your bet, Hot Mode without green symbols costs 300x, and the green version costs 400x.

Available only through the buy menu, the no-greens option works differently. It starts with the full table lit, but each cell can be collected only once. That lowers the maximum potential in exchange for better odds on each collection.

A separate BET+25% button adds a quarter to every spin, in return for more frequent free games and Hot Mode.

How to Play

How the Demo Plays

One control in Slime Bonanza to find before you spin is the BET+25% button. It puts 25% on your stake and, in return, makes the free games and the Hot Mode land more often, with any win in that mode settled on the base bet, not the boosted one.

Autoplay, turbo and the buy menu sit next to it. Stakes run from 0.20 to 2,000 credits over the 20 fixed lines, and the paytable below uses the 100-credit default.

The Numbers Under the Slime

The demo returns 96.31%, a shade above the usual mark, and the game is rated medium volatility. The buys carry their own figures, from 96.36% on standard free games to 96.41% on Hot Mode with greens. Wins pay from column one across, and only the top combination on each line counts.

Symbol Values in Credits

Symbol 5 4 3
Wild (hazard sign) 1500
Ufologist 1000 500 150
Pug 750 400 100
Blaster 600 350 75
Donut 550 300 60
Toxic barrel 500 250 50
A 350 100 25
K 300 75 20
Q 250 60 15
J 200 50 10

All figures are credits, based on the 100-credit bet the game opens with.

Ultimate Slots Verdict

Slime Bonanza is a polished slot with plenty of personality. The alien-invasion theme and count-up win screens provide much of the demo’s entertainment, while the Instant Win Table and Collector system offer a distinctive mechanic that gives slower spins something to build toward. The base game still relies on a Collector landing while the table is lit, so plenty of spins stock cells without paying much. Our best round came from a Hot Mode buy rather than a naturally triggered bonus. Play it for the show first and the payouts second, and the demo is good company.

3.8/5 Very Good

What We Like

  • One Collector can sweep a well-lit table into a substantial win.
  • Strong presentation, from the opening abduction to the pug’s alien reveal.
  • Green symbols pay on their lines while also lighting cells on the table.
  • Bonus buys and the BET+25% option provide more ways to activate the feature.

What Could Be Better

  • The reels can light every cell and still pay little when no Collector turns up, so flat spells are common.
  • The Hot Mode buys are dear at 300x and 400x

Detailed Review

Aliens Over the Cornfield

Slime Bonanza opens with a pug standing alone on a country road at dusk, only for a UFO to beam the poor thing into the sky. Green slime coats the reels, truck, road signs and water tower. The theme goes furthest on the win screens. Barrels of waste are tractor-beamed into a saucer, a grinning alien faces down a suited agent and two squad cars, and the ufologist and his pug howl at the sky as wins climb.

Free games bring new surroundings. Standard mode moves to a red-lit yard lined with barbed wire, where tentacles curl around a wrecked security booth. The green-symbol version switches to a field of pylons beneath a looming power plant. The best reveal comes when the pug unzips its costume to expose the alien hiding inside.

Now and then, a Red Hole also opens on a dead spin, clearing the board of all but Wilds and Scatters and dropping a new set in.

A UFO beams a pug up from a country road in a green tractor beam at the start of Slime Bonanza The pug is already halfway to the mothership.

When the Collector Turns Up

Behind the cartoon chaos is a mechanic built around patience. Green symbols stock the table cell by cell, so plenty can happen on the reels while the balance barely moves. The round changes when a Collector lands with cells lit, sweeping up their values and adding them together as it moves down the reel. If it collects 200x, 20x and 5x, for example, that banks a 225x win in one move. Landing one high on a full column and an uneventful spin can become the round’s biggest hit. Miss it, and all that stored slime pays nothing.

The Buy That Justified Itself

Meaningful collections were slow to arrive during ordinary play. Green symbols first had to activate the table, then a Collector needed to land while those values were waiting. That combination proved uncommon in the base game.

A standard free-games round, triggered naturally by three scatters, lasted 12 spins and eventually filled the table. Only one Collector appeared, gathering just 2x. The round finished on 685 credits, leaving the rest of the lit cells uncashed.

The bonus buys produced more. The 300x no-greens Hot Mode delivered the best round of the review. Two Collectors landed together on its third spin, gathering 531x and 103x. The score swept past the laughing pug and reached 66,420 credits, almost entirely through those two collects.

The pricier 400x green Hot Mode depended on a single collect and finished on 6,740 credits, below its entry cost.

A pug unzips to reveal a laughing alien on a 650x win screen in Slime Bonanza 65,020 credits, and the pug you have been rooting for turns out to be the alien.

The 12,500x That Lives in Theory

The 12,500x top only really lives in the with-greens mode, where fresh greens keep resetting the 5000x cell so it can be collected again. The no-greens mode spends each cell once and caps much lower, near 7,114x, but with fewer cells left each move, the odds of grabbing a big one rise, which is why the cheaper buy can still pay well. Both ceilings sit far above anything a session is likely to reach.

On a medium-volatility model, Slime Bonanza sits mid-table on the numbers, and the collect table keeps most spins interesting even when the lines stay quiet. The regular spins play as the warm-up and the buys as the main event, and if you hold your stake modest against a top that rarely shows, it’s an easy demo to spend half an hour with in free play.

Frequently Asked Questions

The green-slimed symbols do it. Each green symbol that lands switches on one cell, the low ones to begin, while the 500x wants three green hits, the 1000x four and the 5000x five before it comes on.
Because a Collector doesn't stop at one cell. It banks a cell, drops a row and takes the next, and keeps dropping cell by cell, stopping at the bottom or once the cells run dry, so one that lands high on a full table can pile a string of cells into one big figure before it turns Wild.
Yes. Slime Bonanza sells Hot Mode two ways, at 300x the bet with no greens and 400x with them. The green version can reuse the top cells and reach the largest wins, while the cheaper one spends each cell once and settles lower.
The Red Hole. It shows up when a spin has nothing left to pay, pulls every symbol bar Wilds, Scatters and other Red Holes, then lets a new set drop into the gaps to keep the round going.

Similar Demo Slots

View All Alien