Pop Stone is a gem-clearing puzzle set in an ancient stone temple. Match three or more runes of the same type to dissolve them from the grid. Each cleared rune drops new stones from above, creating cascade opportunities. Special runes form from matches of four or more, clearing entire rows or columns when activated. The temple theme uses weathered stone textures, glowing rune effects, and ambient drone music. Treasure chests appear after completing a level with three stars, containing power-ups for future stages.