Full list of all 30 Imperia Online (Windows) achievements worth 400 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game.
The base game contains 20 achievements worth 200 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 200 Gamerscore.
Reach 100 000 net points
Reach 50 000 net points
Reach 10 000 net points
Reach 18 000 population in the entire empire
Send from Caravan Station at least 5000 gold, all at once, to an ally
Enter into a dynastic marriage
Hire and mobilize 50 spies
Get 2 rewards from the casket in Temple
Research Range Attack 3
Research Espionage 3
Research Banking 1
Make an alliance or join one
Build 2 Archery Barracks in a holding
Complete 10 quests
Write a message to a player
Research Medicine 1
Build University 3
Build level 1 of Town square
Have 6 great people in your empire
Complete 5 quests
Found a trading post
Build Fortress 5
Research Banking 5 and take a deposit with small interest
Hire 250 Supply wagons
Take control over 2 provinces
Reach general’s level 10
Reach governor’s level 10
Reach Honor 20
Sell 1000 wood
Plunder 20000 resource in attacks on independent cities