Backgrounds

 There is a number of different planets, places, etc that you're from. The given two backgrounds; major and minor background.

Major background

Gunsmith - you use to build and make weaponry that +5 arms man skill

Scavenger - you have +5 perception digging through looking for goods

Minor background

Goon - you use to be the muscle for higher; a simple man just doing a job for money and not asking the question whether right or wrong; +5 skill points to any weapon-related skills.

Gym beast - +2 strength; you worked out for every day of your life and you're a thick boy with muscles that'll crush anyone in your way!