
The RTP shown is Nolimit City's standard build. Casinos can license a lower-RTP version of the same game — check the figure in the casino's own game info before you play.
A high-volatility mining slot featuring a dynamic 3x3 grid that expands up to 7x7 via the Collapsing Mine xBomb mechanic. xBomb Wilds explode to clear adjacent symbols, expand the reels, and increase a win multiplier. Players can choose between Mouse Mode (8-12 free spins with modifiers) and Rat Mode (3 resetting spins with extreme volatility). Offers up to 70,000x max win with 823,543 ways to win.

xBomb Wild substitutes for all symbols except scatters. When part of a win, it explodes, removing adjacent symbols, expanding the grid by one row/column, and increasing the win multiplier by +1. Can expand the grid from 3x3 up to 7x7.
Triggered by 3 scatters. Player chooses 8, 10, or 12 free spins. Special modifiers (Coin Wagons, Multipliers, Bombs, Bags, Chests, Dwarfs) appear to enhance wins. RTP ranges from 96.41% to 96.85% depending on bonus buy tier.
Triggered by 1-2 Super Scatters. Awards 3 free spins that reset to 3 whenever a Super Scatter lands. Extreme volatility with the same modifiers as Mouse Mode but more aggressive. Can be retriggered.
Three bonus buy options: 66x bet for 3 scatters (RTP 96.41%-96.47%), 250x bet for 3 scatters + 1 Super Scatter (RTP 96.61%-96.72%), and 1000x bet for 3 scatters + 2 Super Scatters (RTP 96.77%-96.85%).
Winning symbols collapse and are removed, allowing new symbols to drop into place. Cascades continue as long as new wins are formed, with the xBomb multiplier persisting during the cascade chain.
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This is a free demo. No real money is involved.
Free demo, uses virtual credits.






Themes: Mining · Gold · Rats · Dwarf · Brown · Compass · Whiskey