Drive around the forest and pick up would-be victims and take them to safety in the only house in the area. You can't shoot the baddies, but you can run them over safely if you're going fast enough.

At first I thought there was a door or window on the house, but it's actually the number 0. If you take someone to the house, the number increases. I never quite solved the mystery of how many to save in order to pass round 1.

In case you're wondering if they ever made a Saver Part 2, yes! I have a copy for the PC-8801, but have yet to play it.