Beast Boy and Terra, the heroes of the animated series "Teen Titans Go!" from Cartoon Network, have been sucked by a strange black hole and find themselves prisoners very deep underground.
At the controls of a flying drill, help Cyborg find them by digging and sinking into the bowels of the earth.
Collect precious ore to buy upgrades for your vehicle and watch out for lava monsters that you will undoubtedly meet underground.
With a bit of luck, you will kill two birds with one stone by finding your friends while becoming richer with collected gems.
See also: Drillionaire 2