If you get in some troubles, and you need to get back to base or a safe zone, you could be able to make a distress signal. The distress signal would bring some friendly NPC to rescue you. ...Now, I hear you say "but that make survival too easy."...And I understand that... And I know what can make it less OP. I didn't had time to check if there will be firendly NPCs... But if there will be, the rescue team would be a seperate crew that would not be too expensive to train, because you would need to make their weapons and get them the equipment you want them to use, if you are in need for help. And naturally, you need to make them follow you, if need them, to go with on a different planet Now, to make the distress signal, you will need to either buy distress signaller, or make one... either way, they are one use only.... And if you badly equiped them, and they never were able to reach you, then you wasted a distress signal. The distress signal item would be a simple transportable radio box (like the army radios.... but more electronicy and futuristic metallic-like.)... let's say something like that (it's pretty close to what I have in mind) If they reach your location, they will escort you to the safe zone or base. When they die, they drop the equipment you gave them. (weapons, armors, things like that... but not vehicules, naturally).