Caverns of Eriban

You are the pilot of a mine supply ship and it is your task to deliver
supplies to various amount of subterranean mining depots scattered deep in the
Caverns of Eriban. Picking up five supplies and re-fuelling your ship on one
of five landing strips on the surface at the entrance to the caverns, you must
negotiate the passages to deliver your goods. As you explore the caverns
looking for the depots you must avoid or shoot various obstacles and if you
touch these obstacles or the walls then you lose one of eight lives. You also
need to take account of the momentum of the craft as you move it with the
joystick.

The depots are represented by a small tower and each has a flashing light with
red indicating it requires supplies while green means it’s has supplies. You
land your ship on a small landing strip next to the tower but land too fast
and the ship is destroyed. Once you have delivered five supplies or your fuel
is getting low then you have to make your way back to the surface and pick up
five more to deliver.