Here is the full list of all 48 Aven Colony achievements.
Complete the Vanaar campaign mission on Normal difficulty or higher
Enable a Colony Boost
Complete 100 building upgrades
Distribute a total of 500 enhancers
Win a campaign mission on Insane difficulty
Attain the rank of Chancellor
Attain the rank of Commander
Attain the rank of High Commander
Attain the rank of Expedition President
Complete the Sandy Gulch campaign mission on Normal difficulty or higher
Complete the Azara Falls campaign mission on Normal difficulty or higher
Complete the Hyla's Crescent campaign mission on Normal difficulty or higher
Complete the Tenari Glacier campaign mission on Normal difficulty or higher
Complete the Arido Mesa campaign mission on Normal difficulty or higher
Complete the Kelori Strand campaign mission on Normal difficulty or higher
Complete the Valley of Death campaign mission on Normal difficulty or higher
Complete the Eden Crater campaign mission on Normal difficulty or higher
Build 100 farming structures
Build 200 Solar Panels
Build 100 Mines or Laser Mines
Destroy 50 Creep Spores before they reach your colony
Recycle 100 structures
Accept 2000 immigrants
Complete 100 trade contracts
Protect the colony from 100 lightning strikes
Deplete 10 Mineral Deposits
Build 10 Retail Centers
Get 1000 colonists in the same colony
Survive for 50 sols in any mission
Own 3 fully functional megastructures in the same colony simultaneously
Own 10 fully functional Parks in the same colony simultaneously
Manufacture 1000 Candy
Enable 10 Social Policies or Powers simultaneously
Activate a Unity Artifact
Activate a Cleansing Artifact
Activate an Empowerment Artifact
Activate a Shielding Artifact
Bring 20 units of Sandworm Meat back to the colony
Reveal 95% of the fog on an expedition map
Rescue 25 lost explorers
Keep 5 Expedition Centers operational simultaneously
Explore 50 points of interest on expedition maps
Win 5 referendum elections in a row with at least 90% of the vote
Receive 10 warnings from Commissioner Veronika
Get 50 colonists infected by the plague
Have 200 colonists unemployed simultaneously
Complete Vanaar by the end of Sol 5 (in campaign mode at Normal difficulty or higher)
Reach a population of 350 colonists in Azara Falls by the end of Sol 5 (in campaign mode at Normal difficulty or higher)