Full list of all 15 Battle Islands: Commanders achievements worth 1,125 gamerscore.
The base game contains 14 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 1 achievements worth 125 Gamerscore.
You have promoted 20 units!
You have reached the Eastern Front Theater!
You have reached the Mediterranean Theater!
You have reached the North Africa Theater!
You have shared a replay with your alliance!
You have donated a unit!
You have joined an alliance!
You have won your first ranked battle!
You have reached the Central Pacific Theater!
Win 100 ranked battles
Win 1,000 ranked battles
Reach the Western Front Theater
Promote 20 units to rank 5
Reach the East Asian Theater!
Reach the Central Europe Theater