Coins pave the way to ancient treasures in Lucky Drums 88, where matching 7-12+ symbols anywhere on the reels awards instant wins. Silver and gold coins that land are collected by respective drums above the 5×5 grid, which can randomly award the Hold & Spin bonus game, an instant cash prize of up to 1,000x, or a multiplier of up to 10x that boosts all wins during the same spin. Gold or silver coins can trigger the Hold & Spin feature on a respective gold or silver 5×3 grid, while both coins can activate the two together. Up to eight of either coin collected during the base game, each with a random money value, are added to their grid before three initial respins begin. When just one grid is active during the feature, drum symbols can randomly hit to trigger a second. Every coin or drum that lands resets the spin count to three. Coins that carry a money value remain on the grid until the feature ends, while those that hit with multipliers leave the grid on the next spin.