Mission Asteroid walkthrough (Apple II - On-line Systems)
19"A terrible tragedy is about to happen...An asteroid of incredible size is headed for a direct collision with the Earth. The predicted impact could destroy all life here - unless something is done quickly.
As an astronaut, it's your duty to rocket to the asteroid and attempt to alter its course. There's no time to lose! If you don't do things exactly right and travel fast enough, there will be DISASTER!
The asteroid will collide with Earth at a pre-determined time. You are wearing a watch, which, if checked periodically, will let you know how which time you have left. If you are quick and careful, you will save us all from oblivion. If not, don't bother landing on Earth again, you will have no home to return to...Good luck!"
Mission Asteroid (https://en.wikipedia.org/wiki/Mission_Asteroid) was a graphics adventure game published by On-line Systems (which later became Sierra on-line) in 1980 for the Apple ][. It was supposed to be the first graphics adventure game published by On-line Systems, but it was launched after Mystery House and Wizard and the Princess, which were also shipped in 1980.
Hope you enjoy the walkthrough!
The long play is done by Smartadventurer, a program that I wrote to automate the playing for vintage Apple ][ games. You can follow the project here: https://vinniethelung.wordpress.com/tag/smartadventurer/
Credits:
Cover art - mocagh.org
Walkthrough - www.soultionarchive.com (Jacob Gunness)
Disk image - 4AM