Clear level 1.
Clear level 2.
Clear level 3.
Clear level 4.
Clear level 5.
Clear level 6.
Clear level 7.
Clear level 8.
Clear level 9.
Clear level 10.
Destroy 1000 Invaders.
Destroy 3000 Invaders.
Destroy 5000 Invaders.
19181
20766
21345
1142
216
1092