No missable achievements (plus 97 unknown)
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Complete the tutorial
Remove 8 obstacles from your islands
Promote the warship in the command bunker
Lose 500 riflemen in battle
Promote the bomber in the command bunker
Expand your base to 4 islands
Loot 2500000 supplies from the enemy
Attain 10 consecutive victories against the enemy
Attain 45 stars in the campaign
Upgrade command bunker to rank 8
Attain 100 offensive victories against the enemy
Upgrade a supply depot to rank 10
Garrison 500 army units
Acquire 2500 dog tags from the enemy