How to Play Topo Mole
Six steps from your first spin to the 3,000x cap. Carve Tunnel Wilds, pick deep in Dig Bonus, climb the Mole Multiplier ladder.
Set Your Bet
Open Topo Mole and adjust your stake between $0.10 and $50. Medium volatility means relatively steady wins from Tunnel Wild events — start at the lower end so you have enough spins to see scatter triggers land. The bet applies uniformly across all 20 Lines on the 5×3 grid.
Spin the 5×3 Underground Grid
Hit spin or set autoplay. The 5×3 grid fills with digging-themed icons — mole character (premium), gold nuggets, lanterns, helmets, pickaxes — alongside card royals. Wins resolve through 20 Lines left-to-right starting from reel 1. Watch for mole wilds (Tunnel Wild trigger), shovel symbols (Dig Bonus), and bonus scatters (Underground Free Spins).
Watch Tunnel Wilds Carve Paths
When a mole wild lands, it carves a path across one row or column, dropping Wild markers on every position it passes through. A single horizontal tunnel can complete up to 5 paylines simultaneously. Multiple tunnels in the same spin can intersect, blanketing large grid sections with Wilds. The wild rate sits around 1 in 12 spins.
Open the Dig Bonus
Land 3 shovel symbols to enter the Dig Bonus pick screen. A grid of underground tiles appears — pick one at a time to reveal cash prizes (5x-250x stake), x2/x3 multiplier tiles, or extra picks. The round ends when you flip a rock tile. Aim for corner tiles — the math weights deeper-layer entry points toward the edges.
Trigger Underground Free Spins
Land 3+ scatter symbols anywhere for 12 Underground Free Spins (4 scatters = 18, 5 scatters = 24). Each spin advances the depth counter by 1, raising the running Mole Multiplier. By spin 12, the multiplier sits at x12. Tunnel Wilds spawn more often and can branch across rows and columns. Retriggers extend the round and push the multiplier past x20.
Decide on the Bonus Buy
Bonus Buy where available costs 100x (avg return ~~70x, RTP 96%). The buy maintains base RTP — typical InOut Games structure. UK and Netherlands block Bonus Buy by regulation. The path to 3,000x runs through Underground Free Spins with high depth multiplier (x18+) combined with branching Tunnel Wilds creating multi-line wins.
Symbol Paytable
Premium icons (mole character, gold nugget) carry the highest line wins; mid-tier digging tools (lantern, helmet, pickaxe) fill the middle; card royals fill the bottom across the 20 Lines.
Bonus Features Explained
Each feature plays differently. Here's what actually happens — no marketing fluff.
Dig Bonus
Land 3 shovel symbols to start the Dig Bonus. Pick underground tiles to reveal coin prizes, multipliers, or extra picks. Each layer goes deeper with higher values. Hit the rock layer and the round ends.
Tunnel Wilds
Wild moles dig tunnels across the reels. When a tunnel wild lands, it extends horizontally or vertically through adjacent positions, turning connected symbols wild. Multiple tunnels in one spin can cover most of the grid.
Underground Free Spins
3 scatter symbols trigger 12 Underground Free Spins. The mole digs deeper each spin — as depth increases, symbol values get higher. Retrigger with 2 more scatters for 6 additional spins.
Mole Multipliers
During Underground Free Spins, each depth level adds 1x to the running multiplier. By spin 12, the multiplier can reach 12x or higher with retriggers. All wins during the feature are multiplied by the current depth level.
Quick Strategy Tips
Bankroll first. Medium volatility produces relatively steady wins. Budget for at least 250 spins at your chosen bet level. At $0.10, that's a $25 session budget. Tunnel Wild events (~1 per 12 spins) provide steady mid-line value during the wait for scatter triggers.
Know the RTP. At 96%, this slot sits at industry standard. Some operators may run lower variants (94-96% common) — verify in the game info screen before spinning.
Underground Free Spins is back-loaded. Inside the bonus, spins 8-12 carry most of the round value because the Mole Multiplier ramps from x1 to x12 across the round. Cosmetically the slot encourages you to celebrate every spin equally, but the math says late-round wins are worth dramatically more. Riding out a slow start is correct — the feature is back-loaded by design.
Dig Bonus tile strategy. Aim for corner tiles — the math weights deeper-layer entry points toward the edges of the grid. Multiplier tiles tend to reveal mid-round rather than at the start, so resist cashing out early if the option appears. Average payout lands near 50x the stake; top 5% of rounds clear 200x.
Ready to Try It?
Test Topo Mole demo before risking real money — feel Tunnel Wilds carve across the grid and watch the depth counter climb hands-on.
Try Free Demo