We have 2 cheats and tips on Nintendo DS. If you have any cheats or tips for Astro Invaders please send them in here. You can also ask your question on our Astro Invaders Questions & Answers page.
To unlock an additional difficulty level for use in Astro Invaders, follow the instructions below:
Insane difficulty: Complete the Story Mode on the Hard difficulty.
To unlock a fourth main weapon for use in Astro Invaders, follow the instructions below:
Fourth primary weapon: Complete the Story Mode on Normal difficulty.