Galactic Invaders Starter Sheet
Galactic Invaders was distributed in both Starters and Boosters. Each Starter deck contains 21 fixed Empire Specific cards and 80 randomized cards. Card rarity for the fixed Starter cards is designated based on how many times the card is duplicated on the sheet, and thus how many copies were included in each starter; Commons appear 4x, Uncommons 3x, Rares 2x, and Very Rares 1x.
The 80 randomized cards were from the Universe Edition set and were distributed the same as they were in Universe starters; eight groups of ten cards, with each group containing 1 Very Rare, 2 Rares, 4 Uncommons or Commons, and 3 Terrain from the Group 2 Terrain sheet.
While other Starters each contained 20 fixed cards, these contain 21. It appears the Sector HQ card was an afterthought and was inserted into the mix after the fact. They were likely printed on another sheet, probably not the Galactic Invaders Very Rare sheet as the boosters were apparently printed and released months after the starters. They were probably inserted on a Promotional run sheet.
Note that the depicted Print Sheets are just example layouts. I don't know what the actual card layout of these sheets were. In fact, the actual layout was likely more randomized to make it easier to pack boosters.