Succesfully defend city 10 times.

Succesfully defend city for the first time.

Succesfully defend city 50 times.

Destroy a City Center for the first time.

Destroy 50 City Centers.

Destroy 10 City Centers.

Have 8 resource producers.

Have 16 resource producers.

Complete 10 quests.

Complete 25 quests.

Complete 40 quests.

Loot 5000 resources in a single attack.

Complete 60 quests.

Loot 50000 resources in a single attack.

Loot 50000 resources in a single attack.

Purchase Gold for the first time.

Loot 500000 resources in a single attack.

Purchase Gold 3 times.

Purchase Gold 5 times.

Recruit 5 Mercenaries.

Recruit 10 Mercenaries.

Hire 10 Mercenaries.

Hire 50 Mercenaries.

Hire 200 Mercenaries.

Train 3 Mercenaries.

Fortify 5 buildings.

Fortify 10 buildings.