Here is the full list of all 24 BattleStorm achievements.
Achieve a multiplier of 300x
Complete each level in World 1.
Achieve a multiplier of 200x
Achieve a multiplier of 100x
Achieve a multiplier of 400x
Achieve a multiplier of 500x
Achieve 75% accuracy on any level.
Achieve 90% accuracy on any level.
Complete each level in World 2.
Complete each level in World 3.
Complete each level in World 4.
Complete all 25 levels.
Score 1 billion total points.
Score 2 billion total points.
Score 5 billion total points.
Destroy 2,000 enemies.
Destroy 5,000 enemies.
Destroy 10,000 enemies.
Destroy 100 enemy boats.
Destroy 500 fuel tanks.
Collect 500 powerups.
Complete any level without taking damage.
Complete a level without collecting a single powerup.
Use your shield to deflect an enemy bullet that would've killed you, then complete the level.