Terranaut Fusion: 地底フュージョン

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.