Boulder Dash

Boulder Dash is a maze-based puzzle video game released in 1984 by First Star Software for Atari 8-bit computers.[4] It was created by Canadian developers Peter Liepa and Chris Gray. The player controls Rockford, who tunnels through dirt to collect diamonds.[5] Boulders and other objects remain fixed until the dirt beneath them is removed, then they fall and become a hazard. Puzzles are designed around collecting diamonds without being crushed and exploiting the interactions between objects (such as a butterfly turning into diamonds when hit with a falling rock). The game's name is a pun on balderdash.[4]