Boulder Dash on the Commodore 64 is an action-puzzle game where you guide Rockford through underground caverns, digging through dirt to collect a required number of diamonds before the exit opens, all while dodging falling boulders and hostile fireflies and butterflies. Every move you make can change how rocks and gems tumble, so you have to carve safe paths, set up chain reactions, and avoid getting trapped or crushed as gravity does its thing. Each cave has a strict time limit and its own layout quirks—like tight tunnels, pockets of enemies, and patterns that can be exploited for huge cascades of gems—making it as much about planning and pattern recognition as quick reflexes, and turning it into one of the C64’s most iconic “think fast” arcade puzzlers.