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