ほりほりドリル:コツコツ採掘作業ゲーム is a free game developed by Toki Mathui for iPhone. It is a super labor-intensive mining game where players dig deeper and deeper to reach the 999th level. The game allows players to collect materials and use them to upgrade their drills.

The game is recommended for those who enjoy labor-intensive games and like to collect a lot of items. It also appeals to players who enjoy selecting random effects for their equipment.

The gameplay consists of digging the ground to collect ores and treasures. The collected ores can be sold to earn coins, which can be used to create powerful drills using blueprints and materials. With the upgraded equipment, players can explore deeper and obtain more valuable ores and stronger blueprints.

One of the main features of the game is the abundance of treasures hidden underground. Players may find special items in treasure chests. The game also features a puzzle blacksmith system where players can fit ores into blueprints in a block puzzle style. If done correctly, a powerful drill can be crafted. Each ore used as a drill material may have a random special effect, such as increased mining speed, increased luck, or expanded lantern range.

ほりほりドリル:コツコツ採掘作業ゲーム is a complete labor-intensive game without a story or stamina system. Players can enjoy digging holes to their heart's content.

Note: The game features binoculars available for purchase in the enhancement facility, which are perfect for searching for something. The effects of [movement speed up] and [start dash] are very useful in the early stages, especially when using sapphire as a drill material. Upon reaching the 100th level, players receive a warp device, which can also be obtained from gold treasure chests.

Credit goes to sound effects from 効果音ラボ, 効果音辞典, OtoLogic, and BGM from 甘茶の音楽工房.