Terranaut Fusion: 地底フュージョン
Dig Deep, Mine Gems & Upgrade
Free · Designed for iPad. Not verified for macOS.
A mysterious cave that resets each time you dig. Take your handmade drill into the depths, collect Kira gems, upgrade your machine, and uncover an ancient secret.
One day, deep in the jungle, a cave suddenly appeared in the hillside.
In its wall, something glittered—a gem.
Climb into your handmade drilling machine and dig deep underground.
But this is no ordinary cave: every time you return to the surface, it goes back to the way it was.
Use the gems you collect—Kira—to upgrade your machine, push ever deeper, and uncover the ancient secret sleeping at the bottom.
- DIG, EARN, UPGRADE
Drill, engine, fuel tank, wheels, lights—
the more you upgrade, the deeper and faster you can dig.
Deeper layers hide more valuable gems and dazzling rare treasures.
- OBSTACLES IN THE DEPTHS
Bottomless rifts, hard bedrock, collapsing ceilings, underground rivers…
Prepare the right gear and materials to break through.
- THREE PUZZLES IN THE SIDE TUNNELS
- Mysterious Floor: use number clues to avoid traps and dig up hidden orbs
- Rune Resonance: a match-3 puzzle to break the seal of an ancient door
- Gem Fusion Furnace: fuse matching gems to create higher-grade ones
- A MYSTERIOUS PARTNER
A small, black, fluffy creature you meet in the cave.
Pet it in the garage and take it along on your expeditions—it may become your most reliable companion.
- MORE ADVENTURES
- Rescue & Salvage missions underground
- Showdowns with a giant rat that lives in the cave
- An ending that awaits those who master everything
Free to play (contains ads).
Available in English, Japanese, Spanish, Korean, and Traditional Chinese.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, tamotsu shiraishi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- tamotsu shiraishi
- Size
- 25.3 MB
- Category
- Adventure
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
English and 4 more
- English, Japanese, Korean, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026torifu