Here is the full list of all 11 STARDROP achievements.
Complete Chapter 4.
Collect 50 DataPads in the game
Complete Chapter 3.
Complete Chapter 2.
Find the secret back-room aboard the SD-01.
Complete Chapter 1.
Read John's secret Email to Aryn.
Change into your APD suit.
Pick up John's DataPad.
Give Rascal some food.
Find and pick up this Easter Egg from "Play With Gilbert".