Here is the full list of all 14 Voyagers achievements.
Place a building
Place 50 buildings.
Create 100 colonies.
Construct a security tower
Construct a space border control
Construct a "labour" camp
Construct 75 solar panels / farms.
Built a Galatic Senate
Launch a mothership
Abandon your colony with an escape pod.
Construct an auto-house
Build a drug empire
Construct a Penrose Mechanism
Construct an Enki statue