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