Here is the full list of all 11 Community Inc achievements.
Complete 50 contracts
20 or more objects on fire
Sell more than 200 items
30 or more Lings killed themselves
30 Lings have more than 80% Happiness
Defeat at least 50 creatures
Have 10 or more buildings
Have 30 or more Lings
Gain over 9999 Surplus
Craft more than 200 items
First play