Terraformer Expedition to Mars

Earth is dying. In a desperate effort to save humanity, all the nations of Earth pool their dwindling resources together one last time to construct and equip three space ships. The mission: Terraform Mars and pave the way for human settlement of the planet. Upon reaching Mars, all three ships are shot down by enemies unknown, crashing to the surface, leaving you, the captain and science officer of one of these ships, marooned on a hostile world. Can you survive, explore and terraform the planet, ensuring the survival of the dying human race? You are Earth's only hope