Frightening Frankie is a dark and intense slot inspired by the classic Frankenstein myth. Gothic visuals, flashes of lightning, and the grotesque Frankie lurking beside the reels create constant tension, where every spin can trigger a powerful chain of bonus features. The game is played on a 5×3 grid with 20 fixed paylines and features high volatility. The core mechanic is the Lightning bonus, activated when one or more lightning symbols land. This feature awards 2–6 Free Spins, during which the lowest-paying symbols are removed from the reels. Each additional lightning symbol resets the round, grants 2–6 extra Free Spins, and removes another symbol — up to five symbols in total. If three or more Scatter symbols appear during the Lightning round, the Monster Trail feature is triggered. In this mode, all wins are multiplied by x2, and remaining Free Spins are carried over into a new bonus round, added to 10–20 base Free Spins. During Monster Trail, flask symbols are collected in a meter. Collecting seven flasks restarts the round with 10 extra Free Spins and a random multiplier of up to x10. Frightening Frankie is ideal for players who enjoy horror-themed slots, layered bonus mechanics, and high-risk gameplay with the potential for big rewards.