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 reached the East Asian Theater!
Promote 20 units to rank 5
You have won 100 ranked battles!
You have reached the Eastern Front Theater!
You have promoted 20 units!
You have reached the Mediterranean Theater!
You have reached the North Africa Theater!
You have donated a unit!
You have shared a replay with your alliance!
You have joined an alliance!
You have won your first ranked battle!
You have reached the Central Pacific Theater!
Win 1,000 ranked battles
Reach the Western Front Theater
Reach the Central Europe Theater