Super Miner - Oil Drilling Slot — Value Score 78.7/100

Super Miner - Oil Drilling is a 5x3 slot with 10 fixed paylines, accepting bets from $0.1 to $100. Base game play involves standard wins from left-to-right combinations, with high scarcity of payouts contributing to its high volatility despite some sources labeling it medium. Visual style evokes gritty oil extraction with industrial drilling motifs, oil rigs, and underground riches imagery. Triggering three or more Free Spins symbols awards up to 20 free spins, where Wilds appear and collect values from Instant Cash symbols displaying random rewards. Collected Wilds grant additional spins and upgrade Instant Cash values across four levels from Small to Huge, potentially yielding up to 2000x the bet or more in top payouts like $20,000 for premium symbols. A Bonus Buy option allows direct access to free spins. The mechanic stands out for its Wild collection system that progressively enhances cash symbol multipliers during the feature, though normal rounds lack expansions or cascades, leading to extended dry spells.