While a scientist gets a Science as a class feature every odd level, others get a science, or a grit, or something with 2 Role Playing Award Points.
At the start of the game everyone gets RPAPs for their background, sort of.
Great: 3 points. A tragic tale such as their whole village being wiped out by undead, causing their whole character being designed around revenge.
Good: 2 points.
So So: 1 point.
Bad: -1 point.
Not even trying: -2 points. Like if somebody uses their computer to random generate 10 characters, and just uses the one with the best stats. Then says, "They're a local dude."
Ballistics: Can design projectile weapons. intelligence bonus + D20 + half level. Sling = 10. Catapult, Trebucket, or suchlike = 15. Crossbows of all sizes =17. Cannons and muskets = 20. Cartridge guns = 23. Bullet guns =25. Rifling adds 3 difficulty.