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