MONSTER LAB

MONSTER LAB

96.11%

RTP

25,000x

Max Win

Volatility:High
Features:Cascading
Theme:HorrorAlchemyZombieSci-Fi

Bonus buy options

  • Buy Bonus100x bet
Reels
7
Rows
7
Paylines (up to)
Cluster Pays
Min Bet
0.1
Max Bet
1000
Release Date
September 17, 2026
0Followers
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0

About this Slot

Monster Lab is a horror, alchemy, zombie and sci-fi themed slot by Mask On Gaming with an RTP of 96.11%, high volatility and a maximum win of 25,000x. The game uses a 7x7 grid with Cluster Pays mechanics.

Monster Wilds substitute for other symbols and count towards clusters. After each winning cascade, Monster Wilds gain +1× multiplier individually, moving once and able to reach 999× on their own.

Power Potion multiplies all Monster Wilds by a value between 2× and 50×. When multiple Power Potions land, their multiplier values compound together.

Duplicator creates an adjacent green Wild symbol, replacing either an existing symbol or an empty space. Up to six Duplicators can appear on a single spin.

Devourer consumes two or more bottle symbols and gains +1× multiplier for each symbol eaten, with spaces refilling afterwards.

Chain converts between two and six ordinary symbols into temporary Wilds. These temporary Wilds remain in place to contribute to wins, then disappear and fall during the next cascade.

Three or more Scatter symbols trigger Free Spins, with each free spin round starting with one Duplicator, one Devourer and one Chain Wild active on the grid. Monster Wilds and their multipliers persist across the entire Free Spins round.

Buy Bonus costs 100x the current bet and triggers the Free Spins feature directly. Bonus Boost costs 3x per spin and increases the chance of triggering Free Spins when three or more Scatters land. Super Boost costs 15x per spin and increases the odds of Super, Chaos, Hidden and Secret Bonus features. Injection Spin costs 50x per spin, guaranteeing both a Power Potion and a Monster Wild starting at 2× or higher multiplier.

MONSTER LAB Community RTP

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MONSTER LAB RTP Calculator

MONSTER LAB has a theoretical RTP of 96.11%. Its volatility is High, so expect long dry spells punctuated by rare, large multipliers. Its win potential is capped at 25,000x your stake. Use the calculator below to estimate your expected return, variance range and risk of ruin over any number of spins.

MONSTER LAB Variance Simulator

MONSTER LAB sessions can swing far from its 96.11% average - its volatility is rated High. The simulator runs many virtual bankroll runs to estimate the bust rate, typical drawdown and best/worst outcomes over a set number of spins - compare a cautious bankroll against an aggressive one.

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Frequently asked questions about MONSTER LAB