Here is the full list of all 23 Isolated achievements.
Complete the tutorial.
Complete the mission 1-1.
Complete the mission 1-2.
Complete the mission 1-3.
Complete the mission 1-4.
Defeat the first boss.
Complete the mission 2-1.
Complete the mission 2-2.
Complete the mission 2-3.
Complete the mission 2-4.
Defeat the second boss.
Complete the mission 3-1.
Complete the mission 3-2.
Complete the mission 3-3.
Complete the mission 3-4.
Defeat the third boss.
Reach the maximum level of health.
Reach the maximum damage level.
Destroy 1000 enemy ships.
Destroy 5000 enemy ships.
Destroy 10000 enemy ships.