Craft

You can craft unique artifacts for your faith via a decision.
A loot box mechanic will open, and may RNGesus be by your side.
You can skip all of that by using the console command: event scifi_artifact_event.009
The only way to get artifacts unique to other Sci-Fi faiths is by stealing them, inheriting them, or using debug mode to take artifacts.

The Darksaber artifact has to be found, but there is an event that generates it.
You can skip to this event by using the console command: event scifi_artifact_event.003

Salvage

You can obtain pre-event artifacts via a decision.
A loot box mechanic will open, and may RNGesus be by your side.
You can skip all of that by using the console command: event scifi_artifact_event.005

There is a 1% chance of salvaging the firearm from the loot box.
You can skip all of that by using the console command: event scifi_artifact_event.001