Prioritize not getting hit to hitting your targets, so don't be as risky as in other games.

Make sure to shoot the shiny airplanes and collect each gray crystal they release as they increase your firing rate or provide a different boost.

You can unlock four Medallions per Stage for these accomplishments:

- Destroy 70% of Enemies Forces.
- Destroy 100% of Enemies Forces.
- Rescue All People.
- Stay untouched.