DigDigDrill combines mining with hack-and-slash-style character building, but its core excavation is deliberately unpressured: there are no enemies or time limits while mining. Players dig through stages for ores and treasure chests, then return to the surface when their bag is full. The stated goal is to reach the 999th floor, with additional challenging stages awaiting miners who get there.
Collected minerals feed a puzzle-like smithing system. Rather than simply choosing a stronger tool, players fit ores into drill blueprints to create equipment, with the arrangement potentially granting special effects. Those effects can shape a build: the game gives movement speed for carrying resources quickly and enhanced explosions for broader destruction as examples. Combining equipment effects is part of strengthening a character, making the loop about both gathering and deciding how to specialize.
Its appeal is framed around collecting items, grinding, and experimenting with equipment synergies, while the later stages provide a challenge beyond the stated floor goal. The design therefore centers on an individual player's pace and choices rather than cooperative or competitive play.