After Dr. Grady and some other members of the archeologic Explorer II expedition on planet Mars went missing, it is your task to find them and bring them back home safely. You start your mission by outfitting your space ship with all nessecary supplies. After having blasted off to space you encounter asteroid fields, enemey spacecraft but also friedly space traders. At last, after landing on Mars you find the remnants of the two ancient alien species which once lived on our red neighbour - the insectoid Zanti and the reptilian Meshim.