Rescue wastelanders is a mission in Jak 3. A large storm was approaching Spargus and Damas was still missing four Wastelanders who had not yet reported back. Jak was ordered to go outside and find them and bring them back safely.
The PlayStation 3 and Vita versions of this mission are related to a trophy named "Do Gooder", completing this mission will reward you with a silver trophy.
Another racing mission through the Wasteland in the midst of a sandstorm while plagued by Marauders. Use the turbo's picked up from destroyed marauder buggies which helps to cut down on the timers. You have 1:30 minutes(on average) for each Wastelander in the desert, this includes driving over to them, picking them up and dropping them off at the Wasteland transport which is also moving throughout the area. All of them are stranded inside the more or less south-western section of the island too.
When you go and pick up the fourth guy you will notice the timer is a long 4:20 (or so) minutes. Approach the light beam only to automatically exit your vehicle and start a cutscene, where after you're forced to fight a dark satellite in this sub-boss fight. The timer will have been reset to 4:20 minutes again.
First it will put up a shield and then fly above you and put up a large 'cage' made out of lasers emitting from its main body. The cage will get smaller and smaller, forcing you to stay as close as possible to the satellite. Right after it will cancel both the shield and the lasers and plunge down into the sand, emitting a damaging shockwave on the ground around it. Dodge the shockwave and shoot it as many times as possible (use either the Wave Concussor or the Beam Reflexor) while it is vulnerable.
It will then reveal a tentacle with which it will spin around and try to hit you, just jump over it and keep shooting. After enough damage is dealt it will repeat the first action again, followed by two shockwaves where after it pulls out two tentacles. Continue hitting it again up until the last phase where it has three shockwaves, three tentacles. Once enough damage has been dealt it will explode in a cutscene, quickly run back to the Sand Shark and race back to Spargus before the timer is up.