The Hot Garbage Add-on for Journey to the Savage Planet has 6 achievements worth 280 gamerscore.
Unplug Kronus and restore Kindred's control of DL-C1
Complete the entire DL-C1 Kindex
Craft all the new upgrades unlocked via exploration of DL-C1
Collect all the scattered postcards of DL-C1
Fly through 12 unique gas rings without touching the ground
Get covered in Tropical Pufferbird milk...