Attack other players 1,000 times.
Collect from your headquarters.
Lose 1,000 infantry units.
Win 375 campaign battles.
Build 100 defensive structures.
Attack 100 enemies who have attacked you.
Construct 300 power-ups.
Destroy 300 power-ups in combat.
Train 500 infantry units.
Attack 300 enemy players.
Build 100 boosters.
Complete 20 social quests.
Build 200 aerial units.
Accumulate 1,500 energy.
Reach level 20.
Set a bounty on 100 enemies.
Win a battle using 3 or more power-ups.
Win a battle without losing any units.
Collect 300,000 coins.
Successfully complete training.
