Halley Wars

1. 
   Stage 1 5

   Clear Stage 1 on Normal or Hard
2. 
   Stage 2 5

   Clear Stage 2 on Normal or Hard
3. 
   Stage 3 5

   Clear Stage 3 on Normal or Hard
4. 
   Stage 4 10

   Clear Stage 4 on Normal or Hard
5. 
   Stage 5 10

   Clear Stage 5 on Normal or Hard
6. 
   Stage 6 10

   Clear Stage 6 on Normal or Hard
7. 
   Stage 7 25

   Clear Stage 7 on Normal or Hard
8. 
   Stage 1 Deathless 10

   Clear Stage 1 without dying on Normal or Hard
9. 
   Stage 2 Deathless 10

   Clear Stage 2 without dying on Normal or Hard
10. 
    Stage 3 Deathless 10

    Clear Stage 3 without dying on Normal or Hard
11. 
    Stage 4 Deathless 25

    Clear Stage 4 without dying on Normal or Hard
12. 
    Stage 5 Deathless 25

    Clear Stage 5 without dying on Normal or Hard
13. 
    Stage 6 Deathless 25

    Clear Stage 6 without dying on Normal or Hard
14. 
    Stage 7 Deathless 50

    Clear Stage 7 without dying on Normal or Hard
15. 
    Defender of Earth Part 1 10

    Clear Stage 1 on Normal or Hard with 0% Damage
16. 
    Defender of Earth Part 2 10

    Clear Stage 2 on Normal or Hard with 0% Damage
17. 
    Defender of Earth Part 3 10

    Clear Stage 3 on Normal or Hard with 0% Damage
18. 
    Defender of Earth Part 4 10

    Clear Stage 4 on Normal or Hard without increasing the damage meter
19. 
    Defender of Earth Part 5 25

    Clear Stage 5 on Normal or Hard without increasing the damage meter
20. 
    Defender of Earth Part 6 25

    Clear Stage 6 on Normal or Hard without increasing the damage meter
21. 
    Defender of Earth Part 7 25

    Clear Stage 7 on Normal or Hard without increasing the damage meter
22. 
    Check Out That Spread! 1

    Upgrade your blaster for the first time
23. 
    Upgrades People, Upgrades! 4

    Upgrade your blaster to the maximum level
24. 
    Must Go Faster 1

    Upgrade your speed for the first time
25. 
    Shooting Star Speed 4

    Upgrade your speed to maximum
26. 
    Halley Mary 50

    Clear the game in a single Continue on Normal or Hard

Achievement names, descriptions and badges are the work of the RetroAchievements community. View this set on RetroAchievements