The Chronicle X Kickstarter campaign included a large number of Stretch Goals, which were eventually delivered in the form of a large Stretch Goal Pack, which included a large number of new Alien Types:
There were also a number of additional Hero characters:
and some additional Map Tiles and various additional cards.
The Chronicle X Kickstarter shipped in two waves, first the core box in one wave, and everything else in a second wave. Between these two waves, it was discovered that there had been manufacturing quality issues with a number of the cards and cardboard components, so in addition to the promised stretch goals, the Stretch Goals Box also contained a number of component upgrades to replace components in the Core Box.