Grubstake
94.5%
RTP
20,000x
Max Win
Bonus buy options
- Golden Touch1.2x bet
- Gold Rush5x bet
- Epic Avalanche25x bet
- Treasure Fall100x bet
- Legendary Drop200x bet
- Reels
- 7
- Rows
- 7
- Paylines (up to)
- Cluster Pays
- Min Bet
- 0.1
- Max Bet
- 1000
- Release Date
- August 9, 2026
About this Slot
Grubstake is a fantasy mining and gems slot from SuperGaming with an RTP of 94.5%, high volatility and a maximum win of 20,000x. The game uses a 7x7 grid with Cluster Pays, awarding wins when five or more identical symbols connect on the grid.
Cascading reels remove winning clusters and drop new symbols into place, which can create consecutive wins within a single spin. Wilds substitute for all symbols except Scatters and can carry multipliers that apply to cluster wins.
Four or more Scatters trigger Free Spins, awarding a minimum of 10 spins and up to 20. During Free Spins, each grid position builds a growing multiplier that applies to wins formed on that position. Three or more Scatters during Free Spins retrigger the feature, awarding additional spins.
Five bonus buy options let players trigger features directly. Golden Touch costs 1.2x the bet. Gold Rush costs 5x the bet. Epic Avalanche costs 25x the bet. Treasure Fall costs 100x the bet. Legendary Drop costs 200x the bet.
Grubstake Community RTP
Real RTP estimated from rounds contributed by the community, across all uploaders.
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Grubstake RTP Calculator
Grubstake has a theoretical RTP of 94.5%. Its volatility is High, so expect long dry spells punctuated by rare, large multipliers. Its win potential is capped at 20,000x your stake. Use the calculator below to estimate your expected return, variance range and risk of ruin over any number of spins.
Grubstake Variance Simulator
Grubstake sessions can swing far from its 94.5% 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.
All Wins
No wins on this slot yet.
Play on Stake*Frequently asked questions about Grubstake
An RTP of 94.5% means Grubstake is built to pay back around 94.5 for every 100 wagered over millions of spins. Any single session can land far above or below that - use the RTP calculator on this page to model your own bet size and spin count.
Over the long run Grubstake's house edge is about 5.5% of everything you wager - roughly 5.5 lost per 100 staked. Short sessions vary widely; the calculator above shows the expected loss and variance range for your inputs.
Quite a lot. Because wins cluster around rare big hits, your balance can move far from the 94.5% average in either direction. The variance simulator above shows typical drawdowns, bust rate and best/worst outcomes for your bankroll.
It depends on your bet size and how long you want to play Grubstake. Use the variance simulator above to test a cautious versus an aggressive bankroll and see how often each survives your target number of spins.
