Full list of all 20 World At Arms (Windows) achievements worth 200 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Windows.
Collect from your headquarters.
Attack 100 enemies who have attacked you.
Attack other players 1,000 times.
Lose 1,000 infantry units.
Construct 300 power-ups.
Destroy 300 power-ups in combat.
Train 500 infantry units.
Build 200 aerial units.
Attack 300 enemy players.
Win 375 campaign battles.
Accumulate 1,500 energy.
Build 100 defensive structures.
Complete 20 social quests.
Set a bounty on 100 enemies.
Reach level 20.
Collect 300,000 coins.
Win a battle using 3 or more power-ups.
Build 100 boosters.
Win a battle without losing any units.
Successfully complete training.